The Least Bittern is the smallest heron in the Americas, a secretive, sparrow-slim marsh bird that most people never see despite its being present in many cattail wetlands. Buff and chestnut with a dark crown and back and large pale buff patches on the wings, it clambers through the reeds by straddling stems with its long toes, and it can compress its narrow body to slip through the densest vegetation. When alarmed it freezes with its bill pointed skyward, like its larger cousin the American Bittern, vanishing into the vertical stems.
Least Bitterns breed in Michigan's larger, denser freshwater marshes, hunting small fish, insects, and frogs from a perch low over the water where they strike with a quick jab. Their soft, dovelike cooing and a variety of quiet clucks are the best clues to their presence, since they rarely fly and even more rarely show themselves in the open. Loss of extensive marsh habitat has made them uncommon and easy to overlook, a marsh specialist that rewards patient listening at the cattail edge.
Hunts small fish, aquatic insects, frogs, tadpoles, and other small prey from a low perch among the reeds, striking quickly with its bill. It forages at the water's edge within dense vegetation, clambering along stems and reaching down to seize prey rather than wading in the open.
It is the smallest heron in the Americas, only about the size of a slim dove or a large sparrow at roughly 13 inches long. Its tiny size and secretive habits make it very easy to overlook.
Least Bitterns stay hidden in dense cattail and bulrush marshes, clambering through the reeds and freezing with the bill pointed up to blend in. They rarely fly or venture into the open, so they are heard far more than seen.
In large, dense freshwater marshes with tall cattails and bulrushes. It breeds in such wetlands in Michigan and has become uncommon as extensive marsh habitat has been lost.
Chicks are covered in buff down that stands up in a punk-like crest, and they clamber through cattails well before they can fly. Juveniles are duller than adults with more streaking on the back.
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