Streptoprocne rutila (Chestnut-collared Swift)
Streptoprocne rutila (Vieillot, 1817)
13-14 cm Almost entirely blackish brown, except for the dark chestnut collar, throat and breast. The tail is long and slightly notched. Females and juveniles show less chestnut on the collar and breast, and some lack it entirely. It may be confused with species of the genus Cypseloides…
