The Marbled Murrelet is unlikely to be anyone’s favorite bird. It probably isn’t even anyone’s favorite auk—puffins are more photogenic, auklets are cuter, and the Great Auk, while extinct, was by definition great. But the humble Marbled Murrelet is a bellwether species, inextricably linked to the health of old growth forests from northern California up through Alaska. And like the Northern Spotted Owl, the bird has become a symbol of conservation in the Pacific Northwest as its nesting habitats are chewed up by urban expansion and the timber industry. As a result, Marbled Murrelet numbers in Washington state have decreased by 44 percent in the last decade and a half. Such a steep population decline is ominous, but thanks to the work of 蜜柚APP Chapters up and down the West Coast, there still might be hope for the species. Marbled Murrelets do not build nests in the traditional sense. Instead, they lay their eggs in the divots and depressions of large tree...