What bird is this? It’s a Merlin! This surprise visitor delighted watchers at Decorah North yesterday by perching, eating, preening, and showing off its yoga skills before flying away. According to most sources, North America is home to five falcon species. From largest to smallest, they stack up like this: Gyrfalcon Peregrine Falcon Prairie Falcon Merlin American Kestrel Like Peregrine falcons, Merlins feed primarily on other birds that they catch in the air, although they will also eat mammals, insects,