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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.
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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.
