Northern Yellow-shafted Flicker (Colaptes auratus)  
Northern "Yellow-shafted" Flicker (Colaptes auratus) ♂  
         
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Northern "Yellow-shafted" Flicker (Colaptes auratus) searching for ants or other insects  inside the knot hole of a maple tree.

Details:  Canon EOS 10D,  shutter 1/2000 second, aperture f6.7, ISO 800, Tamron 500 mm zoom lens at 500 mm, hand-held, no tripod