I'm pretty sure that you were correct with your initial ID. I would bet the farm on this being a first-fall female Golden-cheeked Warbler (GCWA). Although it's undoubtedly the toughest plumage to separate from Black-throated Green (BTNW), I feel that the dark, blackish-olive crown, blackish lores and near lack of yellow on the sides of the vent, along with the July date, all point toward Golden-cheeked over BTNW. The dark coloration on the auriculars may be more extensive than usual on young GCWA but I'm having a hard time judging whether it's a result of some yellow feathers missing or if the feathers are truly dark. Those who have more experience with the wide range of variation in GCWA plumage are encouraged to weigh in.
Thanks for the photos and the challenge!
Justin Bosler Austin, Texas
On Tue, Jul 21, 2020 at 9:06 AM Susan Schaezler <susan...> wrote:
> 7-21-20 Golden-cheeked Warbler @ Warbler Woods Bird Sanctuary > Every day of birding brings more excitement > > > > Susan Schaezler > WarblerWoods.org, http://ebird.org/ebird/hotspot/L213585?yr=cur > 501(c)(3) Cibolo/Schertz/Guadalupe County > Lone Star Land Steward Winner 2011. GCBO Site Partner > Life member TOS, SAAS, TAS >