Hi all, looking for some input on this Yellow-bellied Sapsucker, a continuing rarity (rare for the area), seen in Portland, OR Sunday. Yellow-bellied for the lack of red on the nape and more buffy-brownish tones. Some are calling it juvenile, others first-winter male. I lean towards first-winter male based on the bits of red feathering on the forehead and throat, but looking for more input from those who may be more familiar with these birds.
Also, interestingly the majority of photos show the bird with "fluffed out" belly feathers covering the side vertical white wing patch. Does anyone know about this behavior? Is this just a way they preserve heat in colder weather? Any other reasons sapsuckers would fluff those feathers? Curious.
Maximum fluff: