The pygmy swiftlet (Collocalia troglodytes) is a species of swift in the family Apodidae. It is endemic to the Philippines.
| Pygmy swiftlet | |
|---|---|
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Clade: | Strisores |
| Order: | Apodiformes |
| Family: | Apodidae |
| Genus: | Collocalia |
| Species: | C. troglodytes
|
| Binomial name | |
| Collocalia troglodytes Gray, GR, 1845
| |
Its natural habitat is subtropical or tropical moist lowland forests. At under 9 cm (3.5 in), it's the world's smallest swift. swiftlets that nest in complete darkness rooted in caves have the ability to position an object by reflected sound, precisely used by animals such as dolphins and bats,This phenomenon is called echolocation.
References
2.prince , J., Johnson, K. P., & Clayton, D. H. (2004). The Evolution of echolocation in Swiftlets, 35(2), 135–143. 3.Thomassen, H. A., Den Tex , R., De Bakker, M., & Povel, G. (2005). Phylogenetic relationship among Swifts and Swiflets . Molecular Phylogenetics and Evolution, 37(1), 264–277. doi: 10.1016/j.ympev.2005.05.010
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