Yellow-bellied SapsuckerSphyrapicus varius
8 1/2" (22 cm). A furtive woodpecker mottled with off-white and black; male has red crown and throat; female has only red crown. Both sexes dull yellowish below. Immatures dull brown. In all plumages, distinctive mark is conspicuous white wing stripe, visible both at rest and in flight. Similar to Red-naped Sapsucker, but male lacks red nape patch, and red throat is enclosed by black; throat of female all white. Hybridizes with Red-naped in Rocky Mountains, where puzzling intermediates can be found.