Besides overall color patterns, what specific facial feature is mentioned as a key distinguishing mark for the species?
Answer
The contrasting black mask around the eye
While the general contrast between black and yellow defines the species, precise field identification requires observing subtle details, especially when birds are partially obscured or when trying to differentiate between sexes or subspecies. A critical feature mentioned to help distinguish the Black-and-Yellow Tanager is the presence of a contrasting black mask situated specifically around the eye. Other important distinguishing aspects include the subtle variations in the pattern of yellow coloration found on the crown and nape, which can vary depending on the specific subspecies present in a given location.
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