For America’s 71 million birders, Audubon Songbirds is the best-selling calendar filled with day after day of the familiar avian friends who make bird lovers’ hearts sing. A Carolina Chickadee on a pine bough. A plump Blue Jay resting in the snow. A Broad-billed Hummingbird honing in on a yellow cactus flower. Plus warblers, juncos, orioles, robins, finches, and a Painted Bunting, singing up a storm. Each month’s spread features a large photograph at the top of the page and dozens of smaller ones in the grid below. Text offers extensive information about the featured species. It’s a sighting a day, in full color and dazzling detail.