뿔칼새류 Hemiprocnidae

칼새목의 4종.

Whiskered TreeswiftWhiskered TreeswiftHemiprocne comataCrested TreeswiftCrested TreeswiftHemiprocne coronataGrey-rumped TreeswiftGrey-rumped TreeswiftHemiprocne longipennisMoustached TreeswiftMoustached TreeswiftHemiprocne mystacea