Bounced around a couple spots in the Presidio on Friday morning. The highlight was a hybrid Zonotrichia at Fort Scott at the north end of the Ball Fields opposite the Log Cabin. It was foraging on and around Storey ave, working from the north side of the road to the Ball Fields.
One of the parents is clearly a Golden-crowned Sparrow, but I'm
still not sure if the other one is a White-throated or a
White-crowned. I'm leaning towards the former, but could well be
wrong. Any insights (especially for people with field experience
with these hybrids) would be greatly appreciated.
In size and structure, the bird appeared like a typical
Golden-crowned. The malar markings seemed stronger than
Golden-crowned, the body was grayer overall. The bird's crown was
gold in front with bright white towards the rear, and with
distinctly yellow lores. The supercillium was quite broad. The
bill was dark.