Drawn for my colleagues. On the left, the axial skeleton + pectoral girdle (without any limbs) and the longis colli: the primary muscle responsible for woodpecker drumming. As you might expect, it’s much larger in woodpeckers than other birds.
On the right: all of the above, plus the ol’ pectoralis major, responsible for the downstroke/powerstroke in bird flight.
I came upon this male
Hairy Woodpecker (Picoides villosus) digging for insects yesterday in the wood of an old tree in my neighborhood. Hairy woodpeckers are less common here than the smaller Downy Woodpeckers. Not the greatest pic, but he was so cute I couldn’t resist, even though I didn’t have a telephoto lens.
…A species of woodpecker that is endemic to western North America, ranging from British Columbia through southern California. White-headed woodpeckers typically inhabit montane coniferous forests which are dominated by pine trees. Like other woodpeckers P. albolarvatus feeds mostly on insects and conifer seeds.
Interestingly, the subspecies P. a. gravirostris has a longer bill and tail than the other subspecies, and it is only found in the San Gabriel Mountains. The longer bill and tail are adaptations to be better able to feed on the large spiny cones of Coulter Pines (Pinus coulteri)