Blue-gray Gnatcatcher

Polioptila caerulea

Its scientific name sorts its colors the same way the English name does: Polioptila means 'gray feather' and caerulea means 'sky blue,' the root of 'cerulean.' It does eat gnats, but also other small insects and spiders.

Polioptila joins the Greek polios, 'gray,' and ptilon, 'feather.' Caerulea is Latin for 'dark blue' or 'sky blue.'