I don't cover those here. The birds in this article are primarily bright yellow on the body with either black wings and tail or black on the head. But I include a few other birds with slightly ...

The best feature is the tail pattern. Blue-gray is almost entirely white on outer rectrices; black-tailed and California have mostly black outer rectrices with white tips or edges. Be aware that ...

In good light, black on wings and tail shine with iridescent green, blue, and violet ... rowing wingbeats, but the birds are easily able to quickly change direction in flight.