Piikkipyrstökiitäjä White-throated Needletail Hirundapus caudacutus

Kuvaus: There is also another species, which is possible in Yunnan: Silver-backed needletail Hirundapus conchinensis. It has more darkish throat, and also there is difference in colour of back. This species is not excluded from these individuals with certainty.According to litterature the throat area can be quite pale in Silver-backed. Photo is taken from migrating flock of swifts.