My husband and I had just heard the “priDEEP” call of a Western Tanager one recent morning in Seattle when this bird landed in a Holm Oak. But while Western Tanager females can be pale, they have strong wing bars and don’t have caps. This bird appears to have no wing bars and a dark cap. However, the angle in these photos may obscure any wing bars.
A knowledgeable birding buddy suggested a female Wilson’s Warbler. That made sense because of the cap, but this bird looked different from the female Wilson’s I’ve seen, as well as from photos in several sources. Finally I looked at Stokes, which showed a first-year female Wilson’s Warbler. That looks like the bird. What do others think? I’d appreciate any ideas. Another friend thinks the insect in its bill is a sawfly.