Collocalia

Glanzkopfsalangane ( Collocalia esculenta ). ( From Meyers Lexicon ( 1885-90) )

Collocalia is a species of bird in the family of sailors ( Apodidae ). Originally this genus was attributed all of the nearly 30 species of swiftlets what is seen even today by some authors as. RK Brooke told 1970 swiftlets in three genera on. In the genus Collocalia there remained only three species, and very little sailor with shiny feathers that do not have with the exception of Zwergsalangane have the ability to echolocation.

Features

With a body length of between nine and ten centimeters are the representatives of the genus Collocalia very small sailors who Zwergsalangane ( Collocalia troglodytes) is the smallest Salanganen - type at all. Common to all types of gloss of the plumage, the intensity of both geographical variations shows as well as decreases in abraded plumage. The pattern of the underside of the birds is characteristic: The underside is white except for the lower coverts of the tail and the dark throat which partly continues into the upper chest area.

System

The RK Brooke 1970 made ​​division of swiftlets based mainly on the ability of echolocation. The Aerodramus species have this capability, Brooks assumed that the Collocalia species do not. In 2004, it was clearly demonstrated that the scoring to the genus Collocalia Zwergsalangane (C. troglodytes) has the ability to echolocation. For this property has lost its outstanding importance for distinguishing between genres Aerodramus and Collocalia. A research group led by Henri Thomassen conjectured in 2005 that echolocation is incurred in the Zwergsalangane by convergent evolution. Although the monophyly of Aerodramus and Collocalia was also operated in these studies, the authors were considering all swiftlets to reunite in a genus, since there is now no clear external feature more for distinction.

The following types are attributed to the genus:

  • Glanzkopfsalangane ( Collocalia esculenta )
  • Linchisalangane ( Collocalia Linchi )
  • Zwergsalangane ( Collocalia troglodytes)
George Robert Gray Richard Kendall Brooke
197224
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