I spotted what I'm sure was an Orange-crowned warbler in my back yard
yesterday, very drab yellowish-green bird, without wing bars but it had a
faint but identifiable eye ring. In checking my National Geographic field
guide and Petersons, their illustrations and descriptions have no eye ring.
The Golden Field Guide illustration and the Stokes guide photo both however
show a slight eye ring. Is this a variable feature for this species?

Jack Stephens
Edmonds