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Cypsiurus is a genus of the swift family of birds in the family Apodidae, of the order Apodiformes.
The name Hirundapus is constructed from the names of the swallow genus Hirundo and the swift genus Apus.

1/ Silver-backed needletail (Yến đuôi cứng bụng trắng, Hirundapus cochinchinensis)

2/ White-throated needletail (Yến đuôi cứng họng trắng, Hirundapus caudacutus), also known as needle-tailed swift or spine-tailed swift
The specific name caudacutus comes from the Latin words cauda meaning "tail" and acutus meaning "pointed".

3/ Brown-backed needletail (Yến đuôi cứng lớn, Hirundapus giganteus), or brown needletail