chimney swallow house martin Chaetura pelagica Delichon urbicum
Chimney Swift (Chaetura pelagica) is a small swift. In flight, this bird looks like a flying cigar with long slender curved wings. The plumage is a sooty grey-brown; the throat, breast, underwings and rump are paler. They have short tails. The breeding season of Chimney swifts is from May through July. Their breeding habitat is near towns and cities across eastern North America. Originally, these birds nested in large hollow trees, but now they mainly nest in man-made structures such as large open chimneys. The nest is made of twigs glued together with saliva and placed in a shaded location. They will lay three to seven white eggs, which the female will cover at night. The incubation period is 19-20 days, and the fledglings leave the nest after a month. Chimney swifts can nest more than once in a season. They are long distance migrants and winter in eastern Peru; other nesting locations in South America may exist. They migrate in flocks. This species has occurred as a very rare vagrant to western Europe. The gregarious nature of this species is reflected in that two individuals of this species turned up together on the Isles of Scilly. House Martin (Delichon urbicum), sometimes called the Northern House Martin or Common House Martin, is a migratory passerine bird of the swallow family which breeds in Europe, north Africa and temperate Asia; and winters in sub-Saharan Africa and tropical Asia. It feeds on insects which are caught in flight, and it migrates to climates where flying insects are plentiful. It has a blue head and upperparts, white rump and pure white underparts, and is found in both open country and near human habitation. It is similar in appearance to the two other martin species of the Delichon genus, which are both endemic to eastern and southern Asia. It has two accepted subspecies. Both the scientific and colloquial name of the bird are related to its use of man-made structures. It builds a closed cup nest from mud pellets under eaves or simil
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