From the skyscraping summits of North America—with 125 peaks over 3,000 m—giant rivers drain into three of the world’s oceans, draping the continent in habitat diversity. A well-studied flora and fauna make North America a target for nature explorers. Between the USA and Canada, nearly 1,000 birds have been recorded, with new species added to the list each year. Most of the western hemisphere’s shorebirds breed across the arctic tundra, along with the charismatic Snowy Owl, Snow Goose, and Snow Bunting. Rising from the tundra and nicknamed “North America’s Bird Nursery,” the boreal forest supports billions of breeding birds, including 80 percent of North America’s waterfowl. The continent’s Pacific Northwest supports the largest temperate rainforest zone in the world, with more biomass than the rainforests of the tropics and the breeding ground for the continent’s endemic Pacific Wren and Chestnut-backed Chickadee. More than 65 conifer species grow in North America, including the oldest, tallest, and largest trees in the world. North America is famous for its colorful little Wood-Warblers (Parulidae family), numbering nearly 50 species, and over 40 Sparrows (Emberizidae family) of at least 18 genera breed between the Pacific, Atlantic, and Arctic shores. Off the edges of the coasts lie two long continental shelves and a whole world of pelagic birding that has produced at least 55 “tubenose” species, with new seabirds added annually to the continental list. Visit the continent during spring or fall migrations—along any of four major flyways—and you will be overwhelmed by the spectacle.