Where is the red coloration found on an adult male that helps clearly flag his sex, alongside the throat patch?
Answer
On the forecrown, the very front part of the top of the head.
For positive identification of an adult male Yellow-bellied Sapsucker, observing the head is key, as two red areas typically combine to confirm his sex. In addition to the brilliant red throat patch, the male also displays red coloration on the forecrown. The forecrown specifically refers to the very front section atop the head. This combination of red on both the forecrown and the throat serves as a clear visual signal distinguishing him from the female, whose throat is white and whose forecrown retains the standard black and white striping.
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