Collocalia


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Collocalia

 

(swiftlets), a genus of birds of the suborder Apodes of the order Apodiformes. The birds are 10–14 cm long and have long, narrow wings. The plumage is dark brown or blackish. There are about 20 species, distributed in Southeast Asia, northern Australia, and the islands of the Indian and Pacific oceans (from the Mascarene Islands to Samoa). Most are sedentary birds; only two species, found in China, are migratory.

Swiftlets nest on cliffs, in large tree hollows, and, less frequently, in buildings. Some nest in dark caves, orienting themselves by echolocation. The birds live in colonies and feed on insects. Their nests (edible birds’ nests) are made from saliva or from plant material and feathers glued together with saliva. Swiftlets build their nests over a period of 30 to 50 days. A clutch contains one or two white eggs, which are incubated for about 28 days. The young remain in the nest for as long as two months.

References in periodicals archive ?
The first is that echolocation appeared only once, in a common ancestor of Aerodramus and Collocalia swiftlets and then disappeared in some modern swiftlets.
The food of Edible-nest Swiftlets Collocalia fuciphaga germani Oust.
Breeding biology and moult in the Edible-nest Swiftlet Collocalia fuciphaga germani Oustalet 1878 in Vietnam.
Of the remaining species found at fewer than five sites, some preferred more open habitats (Todiramphus chloris, Rhipidura albiscapa, Artamus leucorhynchus, Zosterops lateralis) and some were rare (Megapodius layardi, Falco peregrinus, Gallicolumba sanctaecrucis, Charmosyna palmarum, Aplonis zelandica); for unknown reasons, others (Columba vitiensis, Ptilinopus tannensis, Cacomantis pyrrhophanus, Collocalia vanikorensis, Turdus poliocephalus) occur only locally.