American BitternBotaurus lentiginosus
23-34" (58-86 cm). A secretive, medium-sized, streaked brown heron. Outer wing appears blackish brown in flight, contrasting with lighter brown of inner wing and body. At close range adults show long black stripe down side of throat. Young night-herons are similar but stockier, with shorter necks and more rounded wings without dark tips; they lack the secretive habits of bitterns.