21-3-2017 HOTEL BOUGANVILLEA, COSTA RICA - BLUE GREY TANAGER (Thraupis episcopus)

The Blue-gray Tanager, Thraupis episcopus, is a medium-sized songbird of the tanager family, Thraupidae. It presents a delightful palette of blue hues, with a light bluish head and underparts, and darker blue upperparts. A distinctive shoulder patch, varying in color among subspecies, adds to its charm. Both sexes are similar in appearance, with the immature birds showing a much duller plumage.

Adults measure between 16–18 cm in length and weigh approximately 30–40 grams. They possess a short and quite thick bill. The shoulder patch coloration is a key feature for identification, ranging from lavender to dark blue or white, depending on the subspecies.

The Blue-gray Tanager is found in open woodlands, cultivated areas, and gardens. It is a species that has adapted well to human-altered landscapes.

This species has a broad range, extending from Mexico through Central America, South America to northeast Bolivia, and northern Brazil, encompassing all of the Amazon Basin except its southernmost part. It has also been introduced to Lima, Peru, and is native to the islands of Trinidad and Tobago.

The Blue-gray Tanager is known for being a common, restless, and confiding bird, often seen in pairs or small groups. It is quite at home in human habitation and is known to partake of cultivated fruits such as papayas.

The vocalizations of this tanager include a squeaky twittering, with interspersed 'tseee' and 'tsuup' call notes.

Breeding habitats are typically high tree forks or building crevices where a deep cup nest is constructed. The female lays one to three, usually two, dark-marked whitish to gray-green eggs. Incubation lasts about 14 days, with a further 17 days to fledging. The species is occasionally targeted by parasitic Molothrus cowbirds.

Subspecies variation primarily involves the hue of the shoulder patch and the overall color of the plumage, which can be used to differentiate between them.

The diet consists mainly of fruit, with occasional nectar, insects, and other arthropods. The Blue-gray Tanager is often seen foraging for wild fruits in abandoned pasture lands.

21-3-2017 HOTEL BOUGANVILLEA, COSTA RICA - RUFOUS COLLARED SPARROW (Zonotrichia capensis)

The Rufous-collared Sparrow, also known as the Andean Sparrow, is a small, charming bird measuring 13.5–15 cm in length and weighing between 20–25 grams. Adults are recognized by their stubby grey bills and a distinctive grey head marked with broad black stripes on the crown sides, and thinner stripes through the eye and below the cheeks. A notable rufous nape and breast sides complement their black-streaked buff-brown upperparts, and they exhibit two white wing bars. Their throats are white, transitioning to off-white underparts that become brown on the flanks, highlighted by a black breast patch. Juveniles present a more subdued appearance with duller, indistinct head patterns and streaked underparts, lacking the adult's rufous collar.

When identifying this species, look for the rufous collar around the nape and the black stripes on the head. The two white wing bars are also key features. The largest subspecies, found on the tepuis, has grey underparts and a more extensive rufous collar that appears as a band of black freckles across the breast.

The Rufous-collared Sparrow thrives in a variety of open or semi-open habitats, including cultivated lands, gardens, parks, grasslands, and scrubby second growth or cerrado. It is well-adapted to urban and suburban environments but is notably absent from dense Amazonian forests.

This adaptable bird ranges from the extreme south-east of Mexico to Tierra del Fuego, and on the island of Hispaniola in the Caribbean. In the northern and western parts of its range, it is typically found at altitudes of 600–4,000 meters, while in the southern and eastern parts, it is commonly found down to near sea level.

The Rufous-collared Sparrow is often seen in pairs or small flocks, holding small territories. It is known for its tame and approachable nature, making it a familiar sight across its extensive range.

The male's song is a delightful mix of slurred whistles and trills, varying geographically. Calls include a sharp "tsip." Listen for songs that may include tee-teeooo, e’e’e’e’e, or teeooo, teeeee, often delivered from a low perch.

Breeding is influenced by food availability and rainfall. Nests are open cups of plant material lined with fine grasses, placed in vegetation on the ground or low in a tree or bush. Females lay two or three pale greenish-blue eggs with reddish-brown blotches, which are incubated for 12–14 days. Males assist in feeding the chicks, which fledge after about two weeks. Brood parasitism by species such as the shiny cowbird may occur.

This sparrow forages on the ground for seeds, fallen grain, insects, and spiders. It may join mixed-species feeding flocks and has been observed picking termites from spider webs.

The Rufous-collared Sparrow is classified as Least Concern by the IUCN, thanks to its widespread distribution and adaptability to human-altered environments.

21-3-2017 HOTEL BOUGANVILLEA, COSTA RICA - BALTIMORE ORIOLE (MALE) (Icterus galbula)

Baltimore orioles live in the Nearctic in summer, including the Canadian Prairies and eastern Montana in the northwest eastward through southern Ontario, southern Quebec and New Brunswick and south through the eastern United States to central Mississippi and Alabama and northern Georgia. They migrate to winter in the Neotropics as far north as Mexico and sometimes the southern coast of the United States, but predominantly in Central America and northern South America. Some areas of the southern United States may retain orioles all winter if they have feeders that appeal to them. The range of this bird overlaps with that of the similar Bullock's oriole in the Midwest, and the two species were once considered to be conspecific under the name northern oriole because they form fertile hybrids. The Baltimore oriole is a rare vagrant to Western Europe.

21-3-2017 HOTEL BOUGANVILLEA, COSTA RICA - RUFOUS BACKED WREN (Campylorhynchus capistratus)

The rufous-backed wren (Campylorhynchus capistratus) is a songbird of the family Troglodytidae. It is a resident breeding species from southwest Mexico to northwestern Costa Rica.

What is now the rufous-backed wren was previously treated as six of the eight subspecies of rufous-naped wren (Campylorhynchus rufinucha). A 2009 publication proposed that Campylorhynchus rufinucha (sensu lato) be split into three species and the International Ornithological Committee (IOC) accepted the splits. What had been C. r. humilis was elevated to species status as Sclater's wren. The reduced C. rufinucha received the new English name Veracruz wren and the other six subspecies became subspecies of rufous-backed wren.

BirdLife International (BLI) has implemented the split but retains the English name rufous-naped wren for C. rufinucha. However, the North American Classification Committee of the American Ornithological Society (NACC/AOS) and the Clements taxonomy have not accepted the split as of early 2021.

The IUCN has assessed the rufous-backed wren as being of Least Concern. "The population has not been quantified since the species was split" but "is suspected to be stable in the absence of evidence for any declines or substantial threats."

The six subspecies of rufous-backed wren accepted by the IOC are:

C. c. nigricaudatus Nelson (1897)

C. c. capistratus Lesson (1842)

C. c. xerophilus Griscom (1930)

C. c. castaneus Ridgway (1888)

C. c. nicaraguae Miller, W. & Griscom (1925)

C. c. nicoyae Phillips (1986)

The last of these has not been accepted by the Clements taxonomy.

The adult rufous-backed wren is 17 cm (6.7 in) long and weighs 29 to 42 g (1.0 to 1.5 oz). There is some variation among the subspecies but generally they have a black crown and eyestripe separated by a white supercilium, a rufous nape, and cinnamon to chestnut upperparts streaked with black and white, especially on the rump. The wings and tail are barred with black and grayish-white. The underparts are white. Young birds have duller upperparts and buff underparts.

The six subspecies of rufous-backed wren are found thus:

C. c. nigricaudatus, the Pacific coastal plain from southwestern Chiapas, Mexico into Guatemala

C. c. capistratus, the Pacific coastal plain from Guatemala south into El Salvador

C. c. xerophilus, the Motagua Valley of Guatemala

C. c. castaneus, interior Guatemala east to Honduras and Nicaragua

C. c. nicaraguae, interior of western Nicaragua

C. c. nicoyae, the Nicoya Peninsula of northwestern Costa Rica

This large wren occurs in lowlands and foothills from sea level up to 800 m (2,600 ft) elevation in Costa Rica and as high as 1,400 m (4,600 ft) in El Salvador. It inhabits dry forest or open woodland, scrub, second growth and savanna, mainly on the Pacific side of the central mountain ranges.

The rufous-backed wren forages actively in low vegetation for insects and other invertebrates, in pairs or family groups. They have adapted to live near humans and sometimes take table scraps. When attempting to consume prey, they may thrash it around with their beak before eating.

The rufous-backed wren's spherical nest has a side entrance and is lined with seed down. It is constructed 1.5 to 8 m (4.9–26.2 ft) high in thorny trees or shrubs, especially bull's-horn acacia. This species sometimes nests close to the nests of wasps and there is experimental evidence that those that do so are afforded substantial protection from predation. The female alone incubates the three to five brown- or black-spotted, white or greenish eggs for about two weeks until hatching, and the young fledge after about the same length of time again. After breeding, families sleep together in dormitory nests like those used for breeding.

The rufous-backed wren's songs vary somewhat among subspecies but the basic structure is "melodic, pure-tone syllables with multiple frequency changes combined into phrases." 

19-3-2017 MIAMI, FLORIDA - PURPLE HONEYCREEPER (MALE) (Cyanerpes caeruleus)

The Purple Honeycreeper, Cyanerpes caeruleus, is a diminutive and vibrant member of the tanager family Thraupidae. This Neotropical avian jewel is adorned with a striking plumage; the male boasts a deep purple hue with contrasting black wings, tail, and underbelly, and sports vivid yellow legs. The female and immature birds present a more subdued palette, with green upperparts and yellowish-buff underparts streaked with green. A cinnamon throat and a distinctive blue moustachial stripe complete their attire. Both sexes have a long, black, decurved bill, with the Trinidadian subspecies C. c. longirostris exhibiting a notably longer bill than its mainland counterparts.

The Purple Honeycreeper's diet is varied, including nectar from bromeliads and other flowers suited to its bill shape, as well as berries, seeds from plants like Trema and Clusia, and a range of fruits. It also consumes insects, foraging primarily in the forest canopy.

The IUCN Red List currently classifies the Purple Honeycreeper as Least Concern, indicating that, for now, this species does not face immediate threats to its survival.

When identifying the Purple Honeycreeper, look for the male's unmistakable purple and black coloration and the female's green and buff streaked appearance. The long, curved bill is a key feature for nectar feeding, and the bright yellow legs of the male are quite distinctive. Juveniles resemble females but may lack the blue moustachial stripe.

This species is primarily a denizen of the forest canopy, but it also adapts to human-altered landscapes such as cocoa and citrus plantations. It thrives in a variety of forest types, including low-growing premontane rainforests rich in epiphytes and mosses, as well as elfin forests and páramo at higher elevations.

The Purple Honeycreeper is found across northern South America, from Colombia and Venezuela through the Amazon Basin and the Guianas. Its range extends west of the Andes to parts of southern Panama and reaches the western fringes of the Pantanal. It is generally seen at elevations up to 1,000 meters above sea level but has been recorded as high as 2,300 meters.

This species is often observed in small groups, actively foraging in the canopy. It is known for its boldness and curiosity, especially in response to the calls of predators such as the ferruginous pygmy owl, which it will approach to mob. The Purple Honeycreeper's diet consists of nectar, berries, seeds, fruits like bananas and papayas, and insects.

The vocalization of the Purple Honeycreeper is a high-pitched, thin 'zree', which is characteristic of the species.

The female takes on the responsibility of constructing a small cup nest within a tree. She incubates a clutch of two eggs, which are white with brown blotches, nurturing the next generation of these forest gems.

While the Purple Honeycreeper is quite distinctive, it may be confused with other honeycreepers. However, the combination of its coloration, bill shape, and habitat preferences can help differentiate it from its congeners.

19-3-2017 MIAMI, FLORIDA - DOUBLE CRESTED CORMORANT (Nannopterum auritum)

The double-crested cormorant (Nannopterum auritum) is a member of the cormorant family of water birds. It is found near rivers and lakes and in coastal areas and is widely distributed across North America, from the Aleutian Islands in Alaska down to Florida and Mexico. Measuring 70–90 cm (28–35 in) in length, it is entirely black except for a bare patch of orange-yellow facial skin and some extra plumage that it exhibits in the breeding season when it grows a double crest in which black feathers are mingled with white. Five subspecies are recognized. It mainly eats fish and hunts by swimming and diving. Its feathers, like all cormorants, are not waterproof, and it must dry them out after spending time in the water. Once threatened by the use of DDT, the numbers of this bird have increased markedly in recent years.

The double-crested cormorant is a large waterbird with a stocky body, long neck, medium-sized tail, webbed feet, and a medium-sized hooked bill. It has a body length of between 70 and 90 cm (28 and 35 in) long, with a wingspan of between 114 and 123 cm (45 and 48 in). Double-crested cormorants weigh between 1.2 and 2.5 kg (2.6 and 5.5 lb). Males and females do not display sexual dimorphism.

This species has dark-colored plumage with bare supra-loreal skin and gular skin that is yellow or orange. An adult in breeding plumage will be mostly black with the back and coverts being a dark grayish towards the center. Nuptial crests, for which the species is named, are either white, black or a mix of the two. These are located just above the eyes with the bare skin on the face of a breeding adult being orange. A non-breeding adult will lack the crests and have more yellowish skin around the face. The bill of the adult is dark-colored. The double-crested cormorant is very similar in appearance to the larger great cormorant, which has a more restricted distribution in North America, mainly on the Canadian maritime provinces; it can, however, be separated by having more yellow on the throat and the bill. The neotropic cormorant also looks very similar, and the two species can sometimes be found together where their ranges meet.

The plumage of juvenile double-crested cormorants is more dark gray or brownish. The underparts of a juvenile are lighter than the back with a pale throat and breast that darkens towards the belly. As a bird ages, its plumage will grow darker. The bill of a juvenile will be mostly orange or yellowish.

19-3-2017 MIAMI, FLORIDA - LAUGHING GULL (Leucophaeus atricilla)

The Laughing Gull, Leucophaeus atricilla, is a medium-sized gull native to the Americas. Its name is derived from its distinctive call, reminiscent of human laughter. This gull exhibits a striking seasonal plumage variation, with a summer adult displaying a white body, dark grey back, wings, and a black head. The wings are notably darker than those of similar-sized gulls, save for the smaller Franklin's Gull, and feature black tips without the white crescent of the latter. The beak is a robust red, and the black hood is largely lost in the winter months.

Adult Laughing Gulls in summer plumage are easily identified by their black heads and red beaks. In winter, they lose the black hood, making the head white with smudgy grey spots. Juveniles and immature birds are generally darker than other gulls of similar size, with first-year birds being greyer below and having paler heads than Franklin's Gulls. Second-year birds can be distinguished by their wing pattern and structure.

These gulls breed in coastal marshes and ponds, often forming large colonies. They construct substantial nests predominantly from grasses on the ground.

The Laughing Gull breeds along the Atlantic coast of North America, throughout the Caribbean, and in northern South America. The northernmost populations are migratory, moving southward in winter, and the species occasionally appears as a rare vagrant in western Europe.

Laughing Gulls are opportunistic omnivores and scavengers, known for their adaptability and resourcefulness in foraging.

The species is named for its raucous "kee-agh" call, which is akin to a high-pitched, laugh-like "ha… ha… ha…".

Breeding occurs in large colonies. The nest is sizeable and made largely from grasses. The three or four greenish eggs are incubated for approximately three weeks.

 

As an opportunistic omnivore and scavenger, the Laughing Gull has a varied diet and demonstrates flexible feeding behavior.

19-3-2017 MIAMI, FLORIDA - BLUE JAY (Cyanocitta cristata)

The Blue Jay, a member of the Corvidae family, is a striking bird native to eastern North America. It is easily recognized by its vibrant blue plumage, white underparts, and distinctive blue crest. A black, U-shaped collar adorns its neck, with a black border trailing behind the crest. Both sexes are similar in appearance, and their plumage remains consistent throughout the year.

To identify a Blue Jay, look for the following characteristics: a size ranging from 22 to 30 cm (9–12 in) from bill to tail, a weight between 70–100 g (2.5–3.5 oz), and a wingspan of 34–43 cm (13–17 in). The crest on the head is a key feature, which the bird can raise or lower. The bird's blue coloration is most vibrant on the crest, back, wings, and tail, with a contrasting white face and off-white underside.

Blue Jays are adaptable and can be found in various habitats, including deciduous and coniferous forests, residential areas, and mixed woodlands with oaks and beeches. They are less common in denser forests and have adapted well to human activity.

This species is widespread across southern Canada and the eastern and central United States, extending as far south as Florida and northeastern Texas. Some populations in the northernmost parts of its range may migrate seasonally.

Blue Jays are known for their intelligence and curiosity. They are bold and aggressive, especially when defending their territory. They may mob predators and have been observed using mimicry to deter competition. Blue Jays are also known to cache food for later consumption.

The Blue Jay has a wide repertoire of vocalizations, including the familiar "jay" call. They can mimic the calls of hawks and are known for their loud, gull-like alarm call. Their "rusty pump" call is a quieter, squeaky sound used among individuals in close proximity.

Blue Jays form monogamous pair bonds and both sexes participate in nest building and rearing the young. Nests are typically built in trees at heights of 3 to 10 m (10 to 33 ft). Clutches consist of 2 to 7 eggs, which are blueish or light brown with darker spots. The young are altricial and stay with their parents for one to two months after hatching.

The Blue Jay can be confused with other jay species, but its distinctive coloration and crest make it relatively easy to distinguish.

The diet of the Blue Jay is primarily composed of seeds and nuts, such as acorns, as well as soft fruits, arthropods, and occasionally small vertebrates. They are known to hide food to eat later and are adept at using their strong bills to crack open nuts.

The Blue Jay is currently listed as Least Concern by the IUCN Red List of Threatened Species, indicating that it is not at immediate risk of population decline.

19-3-2017 MIAMI, FLORIDA - GREAT HORNED OWL (Bubo virginianus)

                                     

The Great horned owl (Bubo virginianus) is a large owl native to the Americas. It is an extremely adaptable bird with a vast range and is the most widely distributed true owl in the Americas. The Great horned owl is one of the earliest nesting birds in North America, often laying eggs weeks or even months before other raptorial birds.

The Great horned owl is a round-faced bird with a distinctive horn-shaped feather tuft on the crown of its head, which is darker than the rest of its head, promoting the overall camouflage. The owl possesses powerful, solid legs, feet, and claws. The Great horned owl has binocular vision due to its eyes, facing forward. The eyes of the horned owl are various shades of yellow. This bird can also be distinguished by the white colored patch on its throat. Black and brown stripes extend all over the white underbelly. The bill of the bird is black, surrounded by white or tan colored plumage. The plumage on their back is darker, covered with brown and black markings.

This owl is native to the Americas with its range, covering the greater part of North America, stretching to Central America, and reaching South America. The Great horned owl occurs primarily in woodlands and open fields, scattered throughout its range. However, the species can also be found in mangroves, grasslands, swampy and marshy areas as well as deserts. In addition, this bird occasionally inhabits human settlements, found throughout rural and urban areas.

These birds are solitary animals, socializing only for nesting. They usually roost by day in protected places such as a tree limb or a recess in a rock. Great horned owls are efficient nighttime hunters, though they are known to hunt in the daytime as well. Horned owls are non-migratory, remaining within the same area throughout the year. Some individuals may become "territorial floaters", not having a certain territory and constantly traveling through territories of other owls. These birds use hooting as a form of communication. Through hooting, they can search for mates during the mating season as well as set up territorial dominance.

19-3-2017 MIAMI, FLORIDA - EASTERN BLUEBIRD (Sialia sialis)

The eastern bluebird (Sialia sialis) is a small North American migratory thrush found in open woodlands, farmlands, and orchards.

The bright-blue breeding plumage of the male, easily observed on a wire or open perch, makes this species a favorite of birders. The male's call includes sometimes soft warbles of jeew or chir-wi, or the melodious song chiti WEEW wewidoo. It is the state bird of Missouri and New York.

The eastern bluebird is found east of the Rockies, southern Canada to the Gulf states, and southeastern Arizona to Nicaragua. The increase in trees throughout the Great Plains during the past century due to fire suppression and tree planting facilitated the western range expansion of the species. as well as range expansions of many other species of birds. From 1966–2015 the eastern bluebird experienced a greater than 1.5% annual population increase throughout most of its breeding and year-round ranges, with exceptions including southern Florida and the Ohio River valley.

Bluebirds tend to live in open country around trees, but with little understory and sparse ground cover. Original habitats probably included open, frequently burned pine savannas, beaver ponds, mature but open woods, and forest openings. Today, they are most common along pastures, agricultural fields, suburban parks, backyards, and even golf courses. Populations also occur across eastern North America and south as far as Nicaragua. Birds that live farther north and in the west of the range tend to lay more eggs than eastern and southern birds.

An isolated, insular subspecies of the eastern bluebird is found on Bermuda, and has a distinctive, brighter blue coloration compared to mainland populations. This population was formerly thought to have been predated the colonization of the islands (making it one of only three extant, resident pre-colonization Bermuda landbirds, alongside the Bermuda white-eyed vireo and gray catbird). However, analysis of fossil strata found no evidence for the existence of bluebirds on the islands prior to European colonization. Using simulations and molecular evidence, a 2013 study found that the Bermuda bluebirds likely descend from very small founder population from a single colonization event during the 1600s. This colonization event could either be a natural one by migratory individuals or an anthropogenic introduction by early settlers, who are known to have introduced several other eastern North American birds like the northern cardinal (Cardinalis cardinalis) to Bermuda very shortly after colonization. It is likely that the alteration to the islands' ecosystem due to the clearing of native forest facilitated this colonization by providing optimal bluebird feeding habitat, along with a lack of predators.

19-3-2017 BUTTERFLY WORLD, FLORIDA - MEXICAN LONGWING BUTTERFLY (Heliconius hortense)

Heliconius hortense, the Mexican longwing, Mexican heliconian or mountain longwing, is a heliconiid butterfly.

The basic color of the uppersides of the wings is black, with a vertical white band on the forewings and an horizontal red band on the hindwings. The undersides are dark brown, with a white band on the forewings and a few red spots at the base of the hindwings. The adults feed on pollens and live up to six months. Females usually lay yellow eggs singly on shoots of various host plants, mainly Passiflora species, of which caterpillars primarily feed.

Heliconius hortense occurs in eastern and western Mexico and from Honduras to Ecuador.

This species can be found in cloud forest from sea level to 2300 m.

The Mexican Longwing Butterfly is native to southern Mexico and northern Central America. It is sometimes called the Mountain Longwing although it is not found only in mountain areas. It looks similar to the butterfly shown on this page but HAS WHITE BARS ON THE FOREWING instead of pink and they have a particular pattern that differs a little from those shown.

They could also be hybrids of H. himera and the Small Postman.

They may also be a related mimic species or other heliconian hybrids that fly in the same regions.

19-3-2017 BUTTERFLY WORLD, FLORIDA - WESTERN TIGER SWALLOWTAIL (Papilio rutulus)

 Papilio rutulus, the western tiger swallowtail, is a swallowtail butterfly belonging to the Papilionidae family. The species was first described by Hippolyte Lucas in 1852.

Like the other tiger swallowtails, the western tiger swallowtail was formerly classified in genus Pterourus, but modern classifications all agree in placing them within Papilio.

This common species is present in western North America. The normal range of the western tiger swallowtail covers much of western North America, from British Columbia to North Dakota in the north to Baja California and New Mexico in the south. Individuals occasionally turn up east of this range; in eastern North America, though, it is replaced by the similar eastern tiger swallowtail, Papilio glaucus.

These butterflies are frequently seen in urban parks and gardens, as well as in rural woodlands and riparian areas.

19-3-2017 MIAMI, FLORIDA - PILEATED WOODPECKER (Dryocopus pileatus)

The Pileated woodpecker (Dryocopus pileatus) is a large woodpecker that live in forests of eastern North America. It is the largest extant woodpecker species in North America, with the possible exception of the Ivory-billed woodpecker, which the U.S. Fish and Wildlife Service has proposed be reclassified as extinct. It is also the third largest species of woodpecker in the world, after the Great slaty woodpecker and the Black woodpecker. "Pileated" refers to the bird's prominent red crest, from the Latin pileatus meaning "capped".

Pileated woodpeckers are mainly black with a red crest, and have a white line down the sides of the throat. Younger specimens tend to have less curved crests, or "mohawks" as some refer to them. They show white on the wings in flight. The flight of these birds is strong and direct, but undulates in the way characteristic of woodpeckers. Adult males have a red line from the bill to the throat; in adult females these are black.

19-3-2017 MIAMI, FLORIDA - CAROLINA WREN (Thryothorus ludovicianus)

The Carolina wren (Thryothorus ludovicianus) is a robust, cinnamon-brown bird that graces the eastern half of the United States, southern Ontario, and northeastern Mexico with its presence. This wren, the state bird of South Carolina, is the second-largest wren species in the United States, following the cactus wren. It measures approximately 12.5 to 14 cm in length, with a wingspan of 29 cm and a weight ranging from 18 to 23 grams. Males are typically larger than females, with a slight sexual dimorphism evident in their size.

The Carolina wren can be identified by its rich brown plumage, which is more chestnut on the rump and upper tail coverts. It has a distinctive white eyebrow stripe, a speckled gray and black ear covert, and a belly that transitions from gray to a warm buff color. The tail features dark bars, and the bird's legs are flesh-colored. The juvenile resembles the adult but has paler and softer plumage with buff-tipped wing coverts.

Carolina wrens favor dense cover in forests, farm edges, and suburban areas. They thrive in a variety of woodlands, including oak hardwoods, mixed oak-pine, and riparian forests. They are also commonly found in overgrown farmland and yards with thick shrubs and trees.

This species is resident in its range, with severe winters limiting its northern distribution. Favorable weather conditions can lead to a northward extension of their breeding range. They are found from southeastern Canada through the eastern United States to northeastern Mexico.

Carolina wrens are active and inquisitive birds, rarely staying still as they investigate their surroundings. They are generally inconspicuous, preferring to stay out of the open. Pairs maintain territories and stay together for several years, exhibiting strong pair bonds.

The male Carolina wren is a prolific singer with a repertoire of various phrases, often described as "teakettle-teakettle" or "cheery-cheery-cheery." Songs are sung throughout the year, except during harsh weather. Females do not sing but may have song control regions suggesting a capacity for song learning.

Carolina wrens are monogamous, usually mating for life. They build arch-shaped nests with a side entrance, using materials like dried plants, bark, and even snake sloughs. Nests are often in cavities or man-made structures. They can raise multiple broods in a season, with clutch sizes ranging from 3 to 6 eggs.

The Bewick's wren is the most similar species, being smaller with a longer tail and grayer-brown above. The white-browed wren, or Cabot's wren, is also similar but considered a separate species or subspecies by some.

The diet of the Carolina wren is primarily invertebrates, including beetles, true bugs, grasshoppers, and spiders. They also consume small lizards, tree frogs, and occasionally vegetable matter. They forage on or near the ground, probing bark crevices and leaf litter.

The Carolina wren is listed as Least Concern by the IUCN. Some populations have been affected by mercury contamination, which can impact reproductive success. They are also subject to brood parasitism by brown-headed cowbirds, which can affect the hatching success of their eggs.

17-3-2017 PARC DE NEGOCIS, BARCELONA - EUROPEAN GREENFINCH (Chloris chloris)

The European greenfinch, or simply greenfinch, is a small passerine bird belonging to the finch family Fringillidae. Exhibiting a predominantly green plumage with yellow accents on the wings and tail, the male is a vibrant sight, while the female and juveniles are more subdued with brownish tones. This bird measures approximately 15 cm in length with a wingspan ranging from 24.5 to 27.5 cm, resembling the size and shape of a house sparrow.

To identify the European greenfinch, look for its thick and conical bill, a characteristic of seed-eating birds. The male's plumage is a striking green with yellow flashes on the wings and tail, whereas the female and young birds are more muted with brownish backs. The male's display flight is akin to a butterfly, a dance to charm its mate.

The greenfinch favors woodland edges, farmland hedges, and gardens with dense vegetation for breeding. It nests in trees or bushes within these habitats.

This bird has a broad range across Europe, North Africa, and Southwest Asia. It is mainly sedentary, but some populations in the northernmost regions migrate southwards in colder months. The species has also been introduced to Australia, New Zealand, Uruguay, and Argentina.

The greenfinch is known for its social nature, often seen in flocks outside the breeding season. It exhibits a breeding season from March to June, with fledglings emerging in early July. The species is capable of producing multiple broods annually.

The song of the greenfinch is a delightful mix of trills and twitters, interspersed with distinctive wheezes, contributing to the rich tapestry of sounds in its natural environment.

The female greenfinch constructs the nest and incubates the eggs, typically laying 4-6 eggs per clutch. Eggs are incubated for about 13-14 days, with chicks being fed an insect larva-rich diet initially, followed by a seed paste as they grow.

The greenfinch can be confused with other finches, but its unique green and yellow plumage, along with its size and bill shape, usually set it apart.

Greenfinches have a varied diet consisting of seeds, berries, fruits, buds, flowers, and some arthropods. They forage in trees, bushes, and on the ground, adapting to available food sources.

The IUCN lists the European greenfinch as Least Concern, indicating a stable population despite some regional declines due to disease outbreaks.

17-3-2017 PARC DE NEGOCIS, BARCELONA - EUROPEAN SERIN (MALE) (Serinus serinus)

The European serin, or simply the serin (Serinus serinus), is a diminutive member of the finch family, Fringillidae. This sprightly bird is the smallest within its family, closely related to the Atlantic canary. It is characterized by its short tail and a length that spans a mere 11 to 12 centimeters. The serin's plumage is a tapestry of nature's palette, with upper parts dappled in dark-streaked greyish green and a conspicuous yellow rump. The underparts are a canvas of yellow breast and white belly, both adorned with heavy streaks.

When attempting to identify the European serin, look for the male's radiant yellow face and breast, which stand out against the greenish backdrop of its feathers. The male also boasts yellow wing bars and yellow tail sides, which can be quite helpful in distinguishing it from similar species. Both sexes share a buzzing trill of a song that resonates through their Mediterranean habitats.

The European serin is partial to open woodland and cultivated areas, often with a sprinkling of conifers. These environments provide the perfect backdrop for breeding and foraging.

This species has a breeding range that extends across southern and central Europe and into North Africa. Populations along the southern and Atlantic coasts tend to be resident, while those in the north are migratory, seeking warmer climates in southern Europe during the winter months.

Outside of the breeding season, the European serin is a sociable creature, forming flocks that may sometimes mingle with other finch species. It is an active and often conspicuous bird, its presence easily announced by its distinctive trill.

The serin's song is a distinctive buzzing trill, a sound that becomes part of the ambient music in regions where these birds are common.

The European serin weaves its nest within the shelter of a shrub or tree, where it lays a clutch of 3 to 5 eggs. The chosen breeding habitats are often areas of open woodland and cultivation, with a preference for some conifers.

The diet of the European serin is predominantly seeds, but it does not shy away from including insects during the breeding season, providing essential protein for its young.

The IUCN Red List categorizes the European serin as Least Concern, indicating that, for now, this species does not face any imminent threats to its survival.

17-3-2017 PARC DE NEGOCIS, BARCELONA - WHITE WAGTAIL (Motacilla alba)

The White wagtail is a slender bird with the characteristic long, constantly wagging tail of its genus. There are a number of other subspecies, some of which may have arisen because of partial geographical isolation, such as the resident British and Irish form, the pied wagtail M. a. yarrellii, which now also breeds in adjacent areas of the neighbouring European mainland. The Pied wagtail exchanges the grey colour of the nominate form with black (or very dark grey in females), but is otherwise identical in its behaviour. Other subspecies, the validity of some of which is questionable, differ in the colour of the wings, back, and head, or other features. Some rraces show sexual dimorphism during the breeding season. As many as six subspecies may be present in the wintering ground in India or Southeast Asia and here they can be difficult to distinguish.

White wagtails breed throughout Eurasia, only being absent in the Arctic. They also breed in the mountains of Morocco and western Alaska. These birds are residents in the milder parts of their range such as western Europe and the Mediterranean, but migratory in much of the rest of their range. Northern European breeders winter around the Mediterranean and in tropical and subtropical Africa, and Asiatic birds move to the Middle East, India, and Southeast Asia. Birds from the North American population also winter in tropical Asia. White wagtails occupy a wide range of habitats but are absent from deserts. They inhabit grasslands, seashores, rocky shorelines, sand beaches, tidepools, rivers, lakeshores, farmland, gardens, and parks. They are also often found in towns and villages. 

17-3-2017 PARC DE NEGOCIS, BARCELONA - LITTLE EGRET (Egretta garzetta)

The Little egret (Egretta garzetta) is small elegant heron in the family Ardeidae. As an aquatic bird, it feeds in shallow water and on land, consuming a variety of small creatures. At one time common in Western Europe, the Little heron was hunted extensively in the 19th century to provide plumes for the decoration of hats and became locally extinct in Northwestern Europe and scarce in the south. Around 1950, conservation laws were introduced in southern Europe to protect the species and their numbers began to increase.

The plumage of the Little egret is normally entirely white, although there are dark forms with largely bluish-grey plumage. In the breeding season, the adult has two long plumes on the nape that form a crest. These plumes are about 150 mm (6 in) and are pointed and very narrow. There are similar feathers on the breast, but the barbs are more widely spread.

16-3-2017 MONTE CORNA, VALENCIA - RED ADMIRAL BUTTERFLY (Vanessa atalanta)

Vanessa atalanta, the red admiral or, previously, the red admirable, is a well-characterized, medium-sized butterfly with black wings, red bands, and white spots. It has a wingspan of about 2 inches (5 cm). It was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. The red admiral is widely distributed across temperate regions of North Africa, the Americas, Europe, Asia, and the Caribbean. It resides in warmer areas, but migrates north in spring and sometimes again in autumn. Typically found in moist woodlands, the red admiral caterpillar's primary host plant is the stinging nettle (Urtica dioica); it can also be found on the false nettle (Boehmeria cylindrica). The adult butterfly drinks from flowering plants like Buddleia and overripe fruit. Red admirals are territorial; females will only mate with males that hold territory. Males with superior flight abilities are more likely to successfully court females. It is known as an unusually calm butterfly, often allowing observation at a very close distance before flying away, also landing on and using humans as perches.

The forewing of this butterfly bears on a black ground an oblique vermilion bandand a group of white subapical spots. On the hindwing the larger portion of the distal margin is red, with a row of small black spots and at the anal angle an elongate blue spot. The underside is partly variegated with blue; the forewing is on the whole similar in markings to the upper, while the hindwing is brightly variegated and clouded, bearing black markings, of which those in the cell resemble a figure (on the left wing 18 or 98, on the right 81 or 89); in the middle of the costal area there is a pale patch and in the distal marginal area a row of ocellus-like spots. Sometimes, especially in the female, the red band of the forewing bearsa small white spot in the middle.

The red admiral is found in temperate regions of North Africa, North and Central America, Europe, Asia, and island regions of Hawaii, and the Caribbean.