redstart

Common, or American, redstart (Setophaga ruticilla)(Top) Stephen Dalton—Natural History Photographic Agency, (bottom) Hal H. Harrison/Grant Heilman
Take a 3-minute break and test your skills!
April 21, 2015
omnipotent Hear it
having unlimited authority or influence
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears