BIRDWALKERMONDAY

Sunday, 25 June 2017

25-6-2017 MONTE CORONA, VALENCIA - SPOTTED FLYCATCHER (Muscicapa striata)

Spotted flycatchers are one of our summer migrants that spend the winter in Africa. They are one of the latest migrants to reach us, with a few trickling into the country from late April and most arriving from mid-May.

Despite arriving relatively late, spotted flycatchers manage to rear two broods of young before departing at the end of August. The success of the second clutch is increased by fewer eggs being laid, meaning less mouths to fill. They will nest in gardens but the nest is usually well hidden on ledges or behind climbing plants.

Spotted flycatchers prefer large flying insects, including flies and butterflies. However, if the weather is cool and insects aren’t flying, they will take smaller invertebrates from leaves and branches. If poor weather persists, many nests fail as these smaller invertebrates tend to be eaten by the parents rather than fed to the young.

In order to reduce the chances of their invertebrate prey escaping, spotted flycatchers have a series of modified feathers, like bristles, down the sides of the bill. They have also adapted to catch stinging insects. They rub the sting end on their perch to remove it, making the prey safe to eat.

The spotted flycatcher is red listed due to its rapid and consistent population decline with an 89 per cent decrease between 1967 and 2012. Evidence suggests that this is due to poor annual survival rates of first year birds, but conditions in their wintering grounds in Africa may also have contributed to the decline.

25-6-2017 MONTE CORONA, VALENCIA - MOORISH GECKO (Tarentola mauritanica)

Tarentola mauritanica, known as the common wall gecko, is a species of gecko (Gekkota) native to the western Mediterranean area of North Africa and Europe. It has been introduced to Madeira and Balearic Islands, and the Americas (in Montevideo, Buenos Aires and California). A nocturnal animal with a predominantly insectivorous diet, it is commonly observed on walls in urban environments in warm coastal areas; it can be found further inland, especially in Spain where it has a tradition of cohabitation with humans as an insect hunter. A robust species, up to 15 centimetres (5.9 in) long, its tubercules are enlarged and give the species a spiny armoured appearance.

The species was first described by Carl Linnaeus in 1758. It is also known as moorish gecko, crocodile gecko, European common gecko, and, regionally, as osga (in Portuguese), salamanquesa (in Spanish) and dragó (in Catalan).

25-6-2017 MONTE CORONA, VALENCIA - BROAD HEADED BUG (Micrelytra fossularum)

Micrelytra fossularum is a species of European bugs belonging to the family Alydidae and type genus of the tribe Micrelytrini. It is the only representative of the monotypic genus Micrelytra.

Micrelytra fossularum can reach a length of about 10–12 millimetres (0.39–0.47 in). It has a slender body with a significant thickening in the abdomen and quite thin legs. The basic color is brown or yellowish, with two white lateral lines along the abdomen. The head is broad, similar in length and width to the pronotum and the scutellum. The compound eyes are globular and protruding. The antennal segments are alternately black and white, but the last one is red, elongated and curved. The hemelytra are greatly reduced (hence the name of the genus) and have a thin white line around the outside edge. These vestigial wings makes this bug incapable of flight. The female is bigger and larger than the male.

These true bugs form large colonies on Poaceae (mainly Dactylis glomerata and Poa annua). They feed on the nutritious fluids contained in seeds, that they reach with their proboscis. The females lay eggs in April and May. The adults can be found in August, at the end of various larval stages.

This species is present in the Mediterranean regions, mainly in Albania, Belgium, Croatia, France, Greece, Italy, Portugal, Slovenia, Spain and former Yugoslavia. It prefers xerophytic meadows.

25-6-2017 FONT EN CARROS, VALENCIA - HOUSE SPARROW (FEMALE) (Passer domesticus)

The house sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of 16 cm (6.3 in) and a mass of 24–39.5 g (0.85–1.39 oz). Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. One of about 25 species in the genus Passer, the house sparrow is native to most of Europe, the Mediterranean Basin, and a large part of Asia. Its intentional or accidental introductions to many regions, including parts of Australasia, Africa, and the Americas, make it the most widely distributed wild bird.

The house sparrow is strongly associated with human habitation, and can live in urban or rural settings. Though found in widely varied habitats and climates, it typically avoids extensive woodlands, grasslands, polar regions, and hot, dry deserts far away from human development. For sustenance, the house sparrow routinely feeds at home and public bird feeding stations, but naturally feeds on the seeds of grains, flowering plants and weeds. However, it is an opportunistic, omnivorous eater, and commonly catches insects, their larvae, caterpillars, invertebrates and many other natural foods.

Friday, 23 June 2017

23-6-2017 MONTE CORONA, VALENCIA - IBERIAN RHINOCEROS BEETLE (Oryctes nasicornis ssp. grypus)

The European rhinoceros beetle (Oryctes nasicornis) is a large flying beetle belonging to the subfamily Dynastinae.

The rhinoceros beetles, which are also called the rhino beetles or horn beetles, belong to many genera in the subfamily Dynastinae of the family Scarabaeidae which also includes the dung beetles . They are among the largest and strongest beetles in the world, reaching more than 150 mm (6 in) in length and able to lift up to 850 times their own body weight, but are completely harmless to humans because they cannot bite or sting . Their common names refer to the characteristic horns borne on the top of the males of most species in the group resembling a rhinoceros; the horns can be as long as two-thirds the total body size and there can be other horns pointing forward from the centre of the thorax while the females are hornless .

The horns are used for dual purposes including digging underground and fighting other males for the right to mate . In fact, the sexes of these insects are usually dimorphic (except Phileurini and some Cyclocephalini and Pentodontini) with males having either horns or enlarged tubercles or foretarsi . The horn size generally provides a good indicator of the nutritional status and physical health of the beetle . The rhinoceros beetles also have rounded convex backs whose coloration varies from black to mottled greenish grey; some are shiny, almost metallic, whereas others may be covered with short fine hairs, giving them a velveteen appearance . Many species of rhinoceros beetles are believed to originate in the rainforest and forest regions of central and southern America .

The European rhinoceros beetle, Oryctes nasicornis (Linnaeus, 1758) is a large flying beetle which can reach up to 60 mm, being one of the smallest species in the subfamily Dynastinae, but is still one of the largest and heaviest beetles found in Europe, and the only representative of this subfamily found in Northern Europe . Males have a long curved horn on the head’s front top (frons), while the females are hornless . The wing cases are dark brown with a glazed appearance, giving it the impression of a shiny conker; the legs and the underside of the body are covered with short red hair; the larvae live on dead, rotten wood and can thus be found in rotting wood stumps and in sawdust; taking around two years to develop in the larval stage, the adults emerge between March to May, flying around at dusk time in Europe; the adults do not feed and live up until the Autumn.

Thursday, 22 June 2017

24-7-2012 DANUBE DELTA, ROMANIA - LITTLE EGRET (Egretta garzetta)

25-5-2014 ISTANBUL, TURKEY - HOODED CROW (Corvus cornix)

22-6-2017 MONTE CORONA, VALENCIA - SARDINIAN WARBLER (JUVENILE) (Sylvia melanocephala)

21-6-2017 RACO DE OLLA, VALENCIA - COMMON TERN (Sterna hirundo)

Common Terns are found nesting on flat, poorly vegetated surfaces close to water, such as beaches, islands, and artificial substrates like floating rafts. They adapt to a variety of habitats, from the taiga to tropical shores, and avoid excessively rainy, windy, or icy areas.

This species has a wide breeding range, encompassing Europe, North Africa, Asia, and North America. It migrates to winter along the coasts of Central and South America, Africa, and southern Asia, with some populations remaining partially migratory in the Caribbean.

Common Terns are agile flyers, capable of rapid turns, hovering, and vertical take-off. They are known for their powerful, direct flight and can fly at speeds averaging 30 km/h, increasing during migration. They breed in colonies, often alongside other seabird species, and exhibit strong territorial behavior.

The Common Tern has a distinctive alarm call, a KEE-yah, and a repertoire of other vocalizations used for communication within the colony and with their chicks. Parents and chicks recognize each other's calls, aiding in maintaining family bonds.

Breeding involves aerial courtship displays and ground rituals. Nests are shallow scrapes, sometimes lined with debris. Clutch size is typically three eggs, camouflaged with blotchy patterns. Both sexes incubate, and chicks fledge in 22–28 days. Adults are defensive of their nest and young, often harassing intruders.

The Common Tern can be confused with the Arctic Tern, Roseate Tern, and Forster's Tern, but differences in plumage details, leg and bill color, and vocalizations aid in distinguishing them.

The diet consists mainly of fish, which they catch by plunge-diving, but may also include molluscs, crustaceans, and large insects. They forage up to 15 km from the breeding colony and may follow schools of fish or predatory fish to locate prey.

The Common Tern is classified as Least Concern, with a large population and extensive breeding range. However, threats such as habitat loss, pollution, and disturbance have led to declines in some areas, particularly in North America. Conservation efforts include habitat management and protection from human disturbance.

21-6-2017 RACO DE OLLA, VALENCIA - BLACK WINGED STILT (Himantopus himantopus)

21-6-2017 RACO DE OLLA, VALENCIA - BLACK HEADED GULL (Chroicocephalus ridibundus)

Wednesday, 21 June 2017

21-6-2017 RACO DE OLLA, VALENCIA - PIED AVOCET (Recurvirostra avosetta)

21-6-2017 ALBUFERA, VALENCIA - GLOSSY IBIS (Plegadis falcinellus)

21-6-2017 ALBUFERA, VALENCIA - SANDWICH TERN (Thalasseus sandvicensis)

Tuesday, 20 June 2017

16-6-2017 LAGUNA DE HOYA ROSA, ALBACETE - EURASIAN COOT (JUVENILE) (Fulica atra)

19-6-2017 VILLALONGA RESERVOIR, VALENCIA - EURASIAN REED WARBLER (Acrocephalus scirpaceus)

The Common Reed Warbler, Acrocephalus scirpaceus, is a medium-sized warbler measuring approximately 13 cm in length with a wingspan ranging from 17 to 21 cm. It exhibits an unstreaked brown back with buff underparts. Both sexes are identical in appearance, which is typical for warblers. Juveniles can be distinguished by their richer buff underparts. The species is characterized by a flattened forehead and a robust, pointed bill.

When identifying the Common Reed Warbler, look for its brown, unstreaked back and buff underparts. The bird's supercilium is less pronounced than that of the larger Great Reed Warbler. In flight, observe the wing-span and listen for its distinctive song.

This species is almost exclusively found in reed beds, often with interspersed bushes, providing it with the necessary cover and nesting sites.

The Common Reed Warbler breeds across Europe into the temperate western Palaearctic and is migratory, wintering in sub-Saharan Africa. It is also a resident species in large parts of Africa.

19-6-2017 VILLALONGA RESERVOIR, VALENCIA - SPECKLED WOOD BUTTERFLY (Pararge aegeria)

19-6-2017 VILLALONGA RESERVOIR, VALENCIA - WHITE LEGGED DAMSELFLY (Platycnemis pennipes)

The white-legged damselfly or blue featherleg (Platycnemis pennipes) is a damselfly of slow-flowing, muddy waters. It occurs from the Atlantic to Siberia and is often abundant throughout its range.

Platycnemis pennipes is about 32 millimetres (1.3 in) long. Mature adults differ from most other blue damselflies in having expanded white edges to the tibiae, paired black markings down most of the abdomen, broad pale brown double antehumeral stripes, wider head and a pale brown pterostigmata.

The male has a blue abdomen that is often pale and usually has a greenish thorax. The female is a very pale yellow-green colour with black markings.

This species favours unshaded slow-flowing sections of muddy rivers with abundant floating vegetation. it has been recorded in tidal rivers and the larvae seem well able to tolerate brackish water. It also occurs in muddy streams but is rare in lakes or ponds of any sort. In north-west Europe, it is mostly confined to flowing waters.

Mating is preceded by the male displaying his white legs in a fluttering display flight in front of females. Elongated eggs are laid whilst in tandem, into emergent stems and especially the underside of floating leaves. The larvae live amongst bottom debris and emerge after two years.

After emerging, adults tend to congregate in the shelter of tall vegetation, although some immatures wander away from water and have been found five kilometres away from the nearest breeding site.