Acorn Woodpecker, male, Mt. Lemmon, Fall 2019
Acorn Woodpecker, female, Mt. Lemmon, Fall 2019. The female has a black band between the white forehead and the red head.
For the Acorn Woodpecker, it is hard to beat the description on the Cornell Lab of Ornithology site: "Reminiscent of a troupe of wide-eyed clowns, Acorn Woodpeckers live in large groups in western oak woodlands. Their social lives are endlessly fascinating: they store thousands of acorns each year by jamming them into specially made holes in trees. A group member is always on alert to guard the hoard from thieves, while others race through the trees giving parrotlike waka-waka calls. Their breeding behavior is equally complicated, with multiple males and females combining efforts to raise young in a single nest."
Male, tending to a granary tree, Mt. Lemmon, Fall 2019. These dead trees are their storehouse for acorns during the winter months, and are almost constantly maintained by members of the group.
For more on Acorn Woodpeckers, see this blog post from 2020