WHirundo
WAngolan swallow
WBarn swallow
WBlack-and-rufous swallow
WBlue swallow
WEthiopian swallow
WHill swallow
WPacific swallow
WPearl-breasted swallow
WPied-winged swallow
WRed-chested swallow
WWhite-tailed swallow
WWelcome swallow
WWhite-bibbed swallow
WWhite-throated swallow
WWire-tailed swallow