BIRDWALKERMONDAY

Wednesday, 18 July 2018

18-7-2018 ALBUFERA, VALENCIA - EUROPEAN TURTLE DOVE (Sternula albifrons)

Populations of turtle dove are in rapid decline across Europe and this species has red list conservation status globally. In the United Kingdom its numbers have declined by 93% since 1994 and across Europe numbers fell by 78% 1980–2013.

Environmentalist groups have said that the decline of turtle doves in Europe is partly because changed farming practices mean that the weed seeds and shoots on which it feeds, especially fumitory, are scarcer, and partly due to shooting of birds in Mediterranean countries. According to a 2001 study cited by the European Commission, between two and four million birds are shot annually in Malta, Cyprus, France, Italy, Spain and Greece.Environmentalists have described spring hunting in Malta as particularly problematic as it is the only country with an EU derogation to shoot birds during their spring migration to breeding grounds.

According to a 2007 study by the European Commission, four currently identifiable potential threats to the turtle dove are habitat loss/modification (medium to low impact), droughts and climate change (mostly unknown but likely low impact), hunting (partly unknown but overall medium impact), and competition with the collared dove (unknown impact). The British Trust for Ornithology has also highlighted Trichomonosis parasite as a threat to the turtle dove.

Tuesday, 17 July 2018

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - WALL BROWN BUTTERFLY (Lasiommata megera)

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - BLACK HEADED GULL (JUVENILE) (Chroicocephalus ridibundus)

17-7-2018 MARCHUQUERA, VALENCIA - EURASIAN TREE SPARROW (MALE) (Passer montanus)

16-7-2018 MONTE CORONA, VALENCIA - STRIPED GRAYLING BUTTERFLY (Hipparchia fidia)

Monday, 16 July 2018

16-7-2018 VILLALONGA RESERVOIR, VALENCIA - LITTLE EGRET (Egretta garzetta)

16-7-2018 VILLALONGA RESERVOIR, VALENCIA - BROAD SCARLET DRAGONFLY (MALE) (Crocothemis erythraea)

The scarlet dragonfly (Crocothemis erythraea) is a species of dragonfly in the family Libellulidae. Its common names include broad scarlet, common scarlet-darter, and scarlet darter.

The scarlet dragonfly is a common species in southern Europe and throughout Africa. It also occurs across western Asia as far as southern China. It is a very rare vagrant in Britain. Its first record in the country was at Hayle Kimbro Pool, The Lizard, Cornwall, on 7 August 1995. Since then there have been a few further records at scattered locations throughout Britain.

A wide range of both running and standing waters, except those that are shaded. Adults may be found some distance from water in habitats ranging from desert to open woodland; absent from dense forest.

Crocothemis erythraea can reach a length of 33–44 millimetres (1.3–1.7 in). These dragonflies haves a flattened and rather broad abdomen. The adult male scarlet dragonfly has a bright scarlet red, widened abdomen, with small amber patches at the bases of the hindwings. Also the veins on the leading edges of the wings are red. Females and immatures are yellow-brown and have a conspicuous pale stripe along the top of the thorax.

16-7-2018 VILLALONGA RESERVOIR, VALENCIA - RED VEINED DARTER DRAGONFLY (MALE) (Sympetrum fonscolombii)

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - COMMON POCHARD (FEMALE) (Aythya ferina)

Sunday, 15 July 2018

1-2000 SYDNEY, AUSTRALIA - LAUGHING KOOKABURRA (Dacelo novaeguineae)

15-7-2018 L'ORXA, VALENCIA - COMMON HOUSE MARTIN (Delichon urbicum)

The Western House Martin (Delichon urbicum), sometimes known as the Common House Martin, is a migratory passerine bird belonging to the swallow family. It is characterized by a blue head and upperparts, a distinctive white rump, and pure white underparts. This species exhibits sexual dimorphism, with both sexes appearing similar, and juveniles displaying a sooty black coloration with white-tipped wing coverts and quills.

Adults measure approximately 13 cm in length, with a wingspan ranging from 26 to 29 cm and an average weight of 18.3 grams. They possess brown eyes, a small black bill, and pink toes and exposed leg parts. The white rump and underparts are particularly noticeable in flight, aiding in distinguishing them from other swallows.

The Western House Martin favors open country with low vegetation, such as pastures, meadows, and farmland, often near water. It is also found in urban areas and can nest in city centers if air quality permits.

This bird breeds across Europe, North Africa, and the Palearctic, migrating to sub-Saharan Africa and tropical Asia for the winter. It is a broad-front migrant, traveling during daylight and feeding on insects in flight.

The Western House Martin is a social bird, often breeding colonially with nests built in close proximity. It is known for its aerial agility, which it uses to evade predators such as the Eurasian Hobby.

The male's song is a soft twitter of melodious chirps, while the contact call is a hard "chirrrp." The alarm call is a shrill "tseep."

Nests are constructed from mud pellets under eaves or similar overhangs on buildings, usually in colonies. The species is known to produce two broods per year, with four to five white eggs per brood. Juveniles fledge after 22 to 32 days and are fed by parents for about a week thereafter.

The Western House Martin can be confused with the Asian House Martin (D. dasypus) and the Nepal House Martin (D. nipalense), but it is the only one with a pure white rump and underparts.

The diet consists primarily of insects caught in flight, with a preference for flies and aphids. Hunting typically occurs within 450 meters of the nest and often near open ground or water.

The Western House Martin is classified as Least Concern by the IUCN, with an extensive range and large population. However, there are indications of population fluctuations and declines in certain regions, attributed to factors such as weather, pesticides, and competition for nesting sites.