Size: 23 – 26 inches tall, wingspan 45 – 47 inches. It looks as if it is hunched over with its head usually tucked down into its shoulders. Its plumage is gray and white with a distinctive black cap and a pair of white plumes that extend from the back of the head. At Lake Renwick, a total of 273 black-crowned night heron nests were recorded in 1983. Bill is heavy and black; legs are yellow. Black-crowned Night-Herons are stocky birds compared to many of their long-limbed heron relatives. Black-crowned night-heron adult underparts and head are gray-white, the back and crown are black, and the wings gray. Night herons get their name by being active mostly from dusk to dawn, but you can still spot them during the daytime. ... in particular, habitat loss, wetland degradation, petroleum and pesticide contamination, hunting and disease. Whitish head plumes develop in … In Illinois, the black-crowned night heron remains on the state endangered list. In the late 1960s, declines in many black-crowned night heron populations were noted, and were attributed to the use of the pesticide DDT, which also affected bald eagles, condors and other birds. Identifying Characteristics: This medium-sized heron is very stocky and short-necked in appearance. They’re most active at night or at dusk, when you may see their ghostly forms flapping out from daytime roosts to forage in wetlands. The Black-crowned night heron has a stocky appearance, as if hunched over, the head tucked down into the shoulders, and it is usually seen with this posture. 7 Bountiful Black-crowned Night Heron Facts. Nycticorax means “night raven,” referring both to the Heron’s night-time hunting habits and their harsh crow-like call. Eyes red. Black-crowned night herons are stocky, often resting with their necks pulled in. The black-crowned night-heron is a rather stocky heron. The black-crowned night-heron is slightly larger than an American crow (1.6 - 2.2 pounds versus 1 – 1.4 pounds; Davis 1993), but less than half the size of the more familiar great blue heron (4.6 … Black-Crowned Night Heron. This species was placed on the list in 1977 and remains there because of its past history of decline, its small population numbers and the threat to its habitat. Population number. Nycticorax nycticorax. Black-crowned Night Herons get their name due to the fact that they hunt at night and early morning, then rest during the day. In the light of day adults are striking in gray-and-black plumage and long white head plumes. Get their name by being active mostly from dusk to dawn, but you can still spot during... Dawn, but you can still spot them during the daytime underparts and head gray-white. Total of 273 black-crowned night herons get their name due to the fact that they at... Means “ night raven, ” referring both to the fact that hunt. 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