Bird activity cooled off a bit today with 52 new birds banded and 10 more recaptured of 12 different species. There were still lots of Common Yellowthroats which made up almost 75% of all birds banded. We also banded our second Blue Grosbeak of the season and another Common Ground-Dove.
|Common Yellowthroat (hatch-year, sex unknown)|
Even though this Common Yellowthroat does not have a black mask we cannot automatically assume that it is a female. A small proportion of hatch-year males can lack black facial feathers which precludes us from positively identifying it as a female. Alternatively, you cannot assume that all birds with black facial feathers are males, because some "older" after hatch-year females can take on male characteristics and have some black facial markings.
|White-eyed Vireo (after hatch-year, sex unknown)|