Two related things come to mind that many birders don’t know about. Most birders know that Snow Geese come in two forms: the well-known “white phase” and the much darker “blue phase”. People love watching huge flocks of Snow Geese, and birders spend hours scanning these flocks to spot not only “blue geese”, but also other species like the Brant and rarities such as the Ross’s Goose and the Greater White-fronted Goose. Do you know how the Snow Goose’s habit of “grubbing” roots, combined with modern crop farming methods on its US wintering grounds, has caused its Arctic breeding habitat to be destroyed? This has also put an end to a fine example of one species evolving into two! Read about this fascinating current event and similarly intriguing, science-based stories about North American birds by purchasing this unique book.