UPDATE: I can finally add a "good" Gray-crowned Yellowthroat, from Estero Llano Grande SP, Hidalgo county, TX on February 07, 2015. - see photo at the bottom of the page, and compare it to the Sabal Palm bird...
This long-staying Gray-crowned Yellowthroat
Geothlypis poliochephala at Sabal Palm Audubon
Sanctuary, Cameron County, TX on May 15, 2005 was a pleasant bonus - but is it a pure GCYE or a hybrid with the local ssp. of Common Yellowthroat - ?:
UPDATE: a "good" Gray-crowned Yellowthroat, from Estero Llano Grande SP, Hidalgo county, TX on February 07, 2015:
