Bill Types Length Characteristics Shape Characteristics Color Long: the bill is decidedly longer than the head , as in a Ruby-throated Hummingbird or an American Woodcock Length Short: the bill is decidedly shorter than the head , as in a Carolina Chickadee or a Tufted Titmouse Length
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Comparison of Hairy & Downy Woodpeckers
with Angulated Commissure: the commissure forms a sharp angle at the point where the tomium proper meets the rictus, as in the Cardinal family
American Tree Sparrow