Spring migration transforms Colorado into a birdwatcher's paradise. The state sits at the intersection of major flyways, bringing species from Central America, Mexico, and the Gulf Coast through on their way to northern breeding grounds. Over 500 species have been recorded in Colorado.
The diversity of habitats - from prairie to alpine tundra - means incredible variety within short distances. In a single day, you might spot sandhill cranes on the plains, mountain bluebirds in the foothills, and ptarmigan above treeline. Few places offer such range.
Peak spring migration runs March through May, with different species peaking at different times. Waterfowl come through early. Warblers and songbirds peak in May. Raptors ride thermals throughout. The Front Range's reservoirs and wetlands concentrate migrating birds into accessible viewing areas.