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Saturday 2 July 2016

29-6-2016 RACO DE OLLA, VALENCIA - BLACK HEADED GULL (Chroicocephalus ridibundus)


Population size
4.8-8.9 Mlnlnn
Life Span
32 years
Weight
190-400
goz
g oz 
Length
38-44
cminch
cm inch 
Wingspan
94-105
cminch
cm inch 
The Black-headed gull (Chroicocephalus ridibundus) is a small and one of the most abundant gulls in much of Europe and Asia, and also in eastern Canada. It displays a variety of compelling behaviors and adaptations. Some of these include removing eggshells from one's nest after hatching, begging co-ordination between siblings, differences between sexes, conspecific brood parasitism, and extra-pair paternity.


The summer adult has a chocolate-brown head (not black, although does look black from a distance), a pale grey body, black tips to the primary wing feathers, and a red bill and legs. The hood is lost in winter, leaving just two dark spots. Immature birds have a mottled pattern of brown spots over most of the body and a black band on the tail. There is no difference in plumage between the sexes. In flight, the white leading edge to the wing is a good field mark. First-year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less fully developed dark hood.

Black-headed gulls breed in much of Europe, Asia, and in coastal eastern Canada. Most of their populations are migratory and winter further south, but some birds reside in the milder westernmost areas of Europe. Some Black-headed gulls also spend the winter in northeastern North America. They breed in large reed beds or marshes, or on islands in lakes, rivers, lagoons, deltas, and estuaries. They may also occur in ponds, canals, and flood lands, nesting on the heather moors, sand dunes, or beaches. During the winter these birds are found in estuaries with sandy or muddy beaches, ploughed fields, moist grasslands, reservoirs, urban parks, farmland, and gardens.

29-6-2016 MONTE CORONA, ADOR - WHITE WAGTAIL (Motacilla alba)


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.


White wagtails are usually seen alone or in pairs, but during migration, they often gather in flocks at good feeding areas or roost at night. These birds feed by day on the ground or on the wing. They may also forage in shallow water catching prey in the mud or may hover over water. The most conspicuous habit of White wagtails is a near-constant tail wagging, a trait that has given the birds their common name. The reasons for this behavior are poorly understood but it has been suggested that wagtails may flush prey, or signal submissiveness to other wagtails. The call of these birds is a sharp 'chisick' and their song consists of twittering phrases; the males use a series of contact calls to attract the female.

Population size
135-221 Mlnlnn
Life Span
12 years
Weight
25
goz
g oz 
Length
16-19
cminch

Friday 1 July 2016

29-6-2016 RACO DE OLLA, VALENCIA - SANDWICH TERN (JUVENILE)(Thalasseus sandvicensis)


The Sandwich tern (Thalasseus sandvicensis ) is a tern in the family Laridae. It is very closely related to the lesser crested tern (T. bengalensis ), Chinese crested tern (T. bernsteini ), Cabot's tern (T. acuflavidus ), and elegant tern (T. elegans ) and has been known to interbreed with the lesser crested. It breeds in the Palearctic from Europe to the Caspian Sea wintering to South Africa, India and Sri Lanka.

The Sandwich tern is a medium-large tern with grey upperparts, white underparts, a yellow-tipped black bill and a shaggy black crest which becomes less extensive in winter with a white crown. Young birds bear grey and brown scalloped plumage on their backs and wings. It is a vocal bird. It nests in a ground scrape and lays one to three eggs.

Like all Thalasseus terns, the Sandwich tern feeds by plunge diving for fish, usually in marine environments, and the offering of fish by the male to the female is part of the courtship display.

29-6-2016 ALBUFERA, VALENCIA - BLACK WINGED STILT (Himantopus himantopus)


Black-winged stilts (Himantopus himantopus) are very long-legged wading birds. They are found in both warm and hot climates, feed on small aquatic creatures, and nest on the ground surface in small colonies. Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day.

The black-winged stilt is a black and white wading bird with incredibly long legs. They live in a variety of wetlands, from marshes to coastal lagoons. They wade through the water, plucking insects from the surface. Their incredibly long legs (around 60% of their height) allow them to walk through deeper water than other wading birds.

Black-winged stilts are found in a wide range across Europe, Africa, Asia, and Australia. The European population is mostly migratory, flying to Africa for the winter. Although the UK is too far north to be part of their usual range, birds from southern Europe do sometimes turn up here. Occasionally, pairs arrive and nest in the UK. Nesting attempts have become more common in recent decades, which has been linked to climate change. Warmer weather in southern Europe dries out the wetlands where they would usually nest, pushing them north to find more suitable sites.


Easily recognised thanks to the incredibly long, bright pink legs. The body is mostly white, with black wings and a dark back. Males have a glossy black back. Females and young birds have a browner back, which contrasts with the black wings. There are often dark markings on the head and neck, especially on males. They have a long, dark needle-like beak.

A rare visitor to the UK. Most records are from southern and eastern England.

Black-winged stilts are very protective of their nests and young. They will mob and chase away much larger birds.

29-6-2016 ALBUFERA, VALENCIA - WESTERN CATTLE EGRET (MALE) (Bubulcus ibis)


The Cattle egret (Bubulcus ibis) is a cosmopolitan species of heron named for its association with cattle. It is the only member of the monotypic genus Bubulcus, although some authorities regard its two subspecies as full species, the Western cattle egret and the Eastern cattle egret. Despite the similarities in plumage to the egrets of the genus Egretta, it is more closely related to the herons of Ardea.


The Cattle egret is a stocky bird. It has a relatively short, thick neck, a sturdy bill, and a hunched posture. The nonbreeding adult has mainly white plumage, a yellow bill, and greyish-yellow legs. During the breeding season, adults of the nominate western subspecies develop orange-buff plumes on the back, breast, and crown, and the bill, legs, and irises become bright red for a brief period prior to pairing. The sexes are similar, but the male is marginally larger and has slightly longer breeding plumes than the female; juvenile birds lack coloured plumes and have a black bill.


Cattle egrets are native to parts of Asia, Africa, and Europe but they have undergone a rapid expansion in their distribution and successfully colonized much of the rest of the world in the last century. Many populations of Cattle egrets are highly migratory, while others are dispersive, and distinguishing between the two can be difficult. In many areas, populations can be both sedentary and migratory. In the Northern Hemisphere, migration is from cooler climes to warmer areas, but Cattle egrets nesting in Australia migrate to cooler Tasmania and New Zealand in the winter and return in the spring. Migration in western Africa is in response to rainfall, and in South America, migrating birds travel south of their breeding range in the non-breeding season. Populations in southern India appear to show local migrations in response to the monsoons. Cattle egrets inhabit wetlands, dry grassy habitats, semi-arid steppes, floodplains, freshwater swamps, shallow marshes, and mangroves. They are often found in fields, croplands, and pastures with poor drainage. When nesting, Cattle egrets are found in woodlands near lakes or rivers, in swamps, or on small inland or coastal islands.

29-6-2016 ALBUFERA, VALENCIA - WESTERN CATTLE EGRET (FEMALE) (Bubulcus ibis ssp. ibis)


The Cattle egret (Bubulcus ibis) is a cosmopolitan species of heron named for its association with cattle. It is the only member of the monotypic genus Bubulcus, although some authorities regard its two subspecies as full species, the Western cattle egret and the Eastern cattle egret. Despite the similarities in plumage to the egrets of the genus Egretta, it is more closely related to the herons of Ardea.

The Cattle egret is a stocky bird. It has a relatively short, thick neck, a sturdy bill, and a hunched posture. The nonbreeding adult has mainly white plumage, a yellow bill, and greyish-yellow legs. During the breeding season, adults of the nominate western subspecies develop orange-buff plumes on the back, breast, and crown, and the bill, legs, and irises become bright red for a brief period prior to pairing. The sexes are similar, but the male is marginally larger and has slightly longer breeding plumes than the female; juvenile birds lack coloured plumes and have a black bill.

Thursday 30 June 2016

29-6-2016 ALBUFERA, VALENCIA - PURPLE HERON (Ardea purpurea)



The purple heron (Ardea purpurea ) is a wide-ranging species of wading bird in the heron family, Ardeidae. The scientific name comes from Latin ardea "heron", and purpureus, "coloured purple". It breeds in Africa, central and southern Europe, and southern and eastern Asia. The Western Palearctic populations migrate between breeding and wintering habitats whereas the African and tropical-Asian populations are primarily sedentary, except for occasional dispersive movements.

It is similar in appearance to the more common grey heron but is slightly smaller, more slender and has darker plumage. It is also a more evasive bird, favouring densely vegetated habitats near water, particularly reed beds. It hunts for a range of prey including fish, rodents, frogs and insects, either stalking them or standing waiting in ambush.


Purple herons are colonial breeders and build a bulky nest out of dead reeds or sticks close to the water' edge among reeds or in dense vegetation. About five bluish-green eggs are laid and are incubated by both birds. The young hatch about four weeks later and fledge six weeks after that. The International Union for Conservation of Nature notes that the global population trend is downwards, largely because of the drainage of wetlands, but assesses the purple heron's conservation status as being of "least concern".


The purple heron is a large bird, 78–97 cm (31–38 in) in length with a standing height from 70 to 94 cm (28 to 37 in) and a 120–152 cm (47–60 in) wingspan. However, it is slender for its size, weighing only 0.5 to 1.35 kg (1.1 to 3.0 lb). It is somewhat smaller than the grey heron, from which it can be distinguished by its darker reddish-brown plumage, and, in adults, its darker grey back. Adults have the forehead and the crown of the head black, with a dark stripe down the back of the neck that terminates in a slender, dangling crest. This is shorter than the crest of the grey heron and does not exceed 140 mm (5.5 in). The sides of the head and the neck are buffish chestnut, with dark streaks and lines down either side of the whole the neck. The mantle is oily brown and the upper scapular feathers are elongated but not the lower ones. The rest of the upper parts and the tail are brownish grey. The front of the neck is paler than the sides and there are some elongated feathers at the base of the neck which are streaked with white, chestnut and black. The breast is chestnut brown, with some blackening at the side, and the belly and under-tail coverts are black. The brownish-yellow beak is long, straight and powerful, and is brighter in colour in breeding adults. The iris is yellow and the legs are brown at the front and yellowish behind.

Wednesday 29 June 2016

29-9-2016 MALDON, ESSEX - EUROPEAN HERRING GULL (Larus marinus)


The European herring gull (Larus argentatus) is one of the best-known of all gulls along the shores of Western Europe, it was once abundant. While the numbers of these birds appear to have been harmed in recent years, possibly by fish population declines and competition, they have proved able to survive in human-adapted areas and can often be seen in towns acting as scavengers.

Adult Herring gulls in breeding plumage have a light grey back and upper wings and white head and underparts. The wingtips are black with white spots known as "mirrors". The bill is yellow with a red spot and a ring of bare yellow skin is seen around the pale eye. The legs are normally pink at all ages, but can be yellowish, particularly in the Baltic population, which was formerly regarded as a separate subspecies "L. a. omissus". Non-breeding adults have brown streaks on their heads and necks. Male and female plumage are identical at all stages of development, but adult males are often larger. Juvenile and first-winter birds are mainly brown with darker streaks and have dark bills and eyes. Second-winter birds have a whiter head and underparts with less streaking and the back is grey. Third-winter individuals are similar to adults, but retain some of the features of immature birds such as brown feathers in the wings and dark markings on the bill. The European herring gull attains adult plumage and reaches sexual maturity at an average age of four years.


2-2.4 Mlnlnn
Life Span
30-49 years
Weight
710-1525
goz
g oz 
Length
55-67
cminch
cm inch 
Wingspan
125-155
cminch
cm inch 
European herring gulls breed across Northern Europe, Western Europe, Central Europe, Eastern Europe, Scandinavia, and the Baltic states. Some European herring gulls, especially those residents in colder areas, migrate further south in winter, but many are permanent residents, e.g. in Ireland, Britain, Iceland, or on the North Sea shores. These birds inhabit coastal areas, lakeshores, reservoirs, intertidal pools, mudflats, and newly plowed fields. They can also be found in human-adapted areas and can often be seen in towns.

Tuesday 28 June 2016

21-6-2016 BIOPARC,VALENCIA - RING TAILED LEMUR (Lemur catta)



Population size
10-100 Thou
Life Span
15-33 years
Top speed
20
km/hmph
km/h mph 
Weight
2.5-3.5
kglbs
kg lbs 
Length

The Ring-tailed lemur (Lemur catta) is a large strepsirrhine primate and the most recognized lemur. It belongs to Lemuridae, one of five lemur families, and is the only member of the Lemur genus. Like all lemurs it is endemic to the island of Madagascar and endangered. Experiments have shown that the Ring-tailed lemur, despite the lack of a large brain (relative to simiiform primates), can organize sequences, understand basic arithmetic operations and preferentially select tools based on functional qualities.


The Ring-tailed lemur has a slender frame and narrow face, fox-like muzzle. Its long, bushy tail is ringed in alternating black and white transverse bands, numbering 12 or 13 white rings and 13 or 14 black rings, and always ending in a black tip. The total number of rings nearly matches the approximate number of caudal vertebrae (~25). Its tail is longer than its body and is not prehensile. Instead, it is only used for balance, communication, and group cohesion. The pelage (fur) is so dense that it can clog electric clippers. The ventral (chest) coat and throat are white or cream. The dorsal (back) coat varies from gray to rosy-brown, sometimes with a brown pygal patch around the tail region, where the fur grades to pale gray or grayish brown. The dorsal coloration is slightly darker around the neck and crown. The hair on the throat, cheeks, and ears is white or off-white and also less dense, allowing the dark skin underneath to show through. The muzzle is dark grayish and the nose is black, and the eyes are encompassed by black triangular patches. Facial vibrissae (whiskers) are developed and found above the lips (mystacal), on the cheeks (genal), and on the eyebrow (superciliary). Vibrissae are also found slightly above the wrist on the underside of the forearm. The ears are relatively large compared to other lemurs and are covered in hair, which has only small tufts if any. Although slight pattern variations in the facial region may be seen between individuals, there are no obvious differences between the sexes.

21-6-2016 MONTE CORONA, VALENCIA - BOX BUG (Gonocerus acuteangulatus)


Gonocerus acuteangulatus is a herbivorous species of true bug in the family Coreidae. It is commonly known as the box bug in the UK as it once only occurred in Box Hill in Surrey where it fed on box trees.

This species was formally described by the German zoologist Johann Goeze in 1778, under the name Cimex acuteangulatus.

This species commonly occurs throughout the Mediterranean region and extends to Central Asia and parts of northwestern Europe.


These heat-loving bugs inhabit mainly dry and warm, south-exposed environments, bushes and forest edges with shrubs that bear berries and small trees of various families, especially Buxaceae and Rhamnaceae, as well as Rosa canina and Crataegus species (Rosaceae) or Lonicera xylosteum (Caprifoliaceae).

Gonocerus acuteangulatus is a medium-sized insect, between 11 and 14 mm long as an adult. These bugs are speckled reddish-brown with a slightly expanded abdomen. The nymphs have a green abdomen. This species is rather similar to Coreus marginatus, but it shows a narrower abdomen and has sharper lateral margins of the pronotum (hence the Latin species name acuteangulatus).

Adults can be found all year. They mainly feed on the juice of the ripe fruits of the host plants. This species is a harmful pest of the hazel and pistachio. It can also be a vector of the fungus Nematospora coryli, an agent of stigmatomycosis.

Monday 27 June 2016

17-6-2016 MONTE CORONA, ADOR - COMMON GERANIUM BRONZE BUTTERFLY (Cacyreus marshalli)


The geranium bronze or brun des pélargoniums in French (Cacyreus marshalli), is a butterfly in the family Lycaenidae.

The geranium bronze butterfly is native to South Africa. The butterfly was first introduced to Europe in the late 20th century, where it has quickly spread to many southern and eastern European regions. Since its introduction to Europe, the geranium bronze butterfly has become a pest to cultivated Pelargonium and Geranium plant species. Currently, efforts are being made to contain the spread of the geranium bronze butterflies as well as to determine the most effective pesticide for the species.


The adult geranium bronze butterfly's wingspan ranges from 15–23 mm in males and 18–23 mm in females. The wings are brown/bronze with a white border outlining the wings. The underside is a grey-brown with darker bands interlaced with white, creating an intricate pattern. The hindwings contain an eye spot in order to divert predators from attacking. The male and female are similar in appearance.


Unfortunately, as pests, the geranium bronze butterflies have caused economic troubles as well. In countries like Spain, the Geranium plant species are highly bought in Spanish homes as ornaments. According to Sarto i Monteys et al., these plants are highly important in both sales and in employment for both production and marketing (Sarto i Monteys V 1991). In Spain alone, there are four major Geranium plant companies, together collecting over $30 million a year in the market. Companies have already seen drops in sales as the Geraniums have been affected by these butterflies. Currently, research is being done to find effective ways to prevent the attacks by these butterflies, but unfortunately many possible insecticides are too chemically potent on the plants that control of these butterflies has been difficult.

Sunday 26 June 2016

26-6-2016 VILLALONGA RESERVOIR - LITTLE RINGED PLOVER (Charadrius dubius)


The little ringed plover (Charadrius dubius ) is a small plover. The genus name Charadrius is a Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate. It derives from Ancient Greek kharadrios a bird found in river valleys (kharadra, "ravine"). The specific dubius is Latin for doubtful, since Sonnerat, writing in 1776, thought this bird might be just a variant of common ringed plover.

Adult little ringed plovers have a grey-brown back and wings, a white belly and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes with white above and a short dark bill. The legs are flesh-coloured and the toes are all webbed.
This species differs from the larger ringed plover in leg colour, the head pattern, and the presence of a clear yellow eye-ring.

Their breeding habitat is open gravel areas near freshwater, including gravel pits, islands and river edges across the Palearctic including northwestern Africa. They nest on the ground on stones with little or no plant growth. Both males and females take turns incubating the eggs.

They are migratory and winter in Africa. These birds forage for food on muddy areas, usually by sight. They eat insects and worms.