Black-crowned Night Heron (Nycticorax nycticorax)

Black-crowned Night Heron (Nycticorax nycticorax)

The Black-crowned Night Heron (Nycticorax nycticorax) is a medium-sized heron belonging to the family Ardeidae. It is a widespread species with a range that includes North and South America, Europe, Africa, Asia, and Australia. As its name suggests, the Black-crowned Night Heron is primarily active during the night, although it can also be seen foraging during the day. It inhabits a variety of wetland habitats, such as marshes, swamps, rivers, lakes, and ponds, as well as coastal areas like estuaries and mangroves.

Physical Characteristics:

The Black-crowned Night Heron measures around 58-66 centimeters (23-26 inches) in length, with a wingspan of approximately 115 centimeters (45 inches). It has a stocky build, a short neck, and relatively short legs compared to other herons. The bird’s plumage is characterized by a black crown and back, gray wings, and a white or pale gray underside. It has a red eye and a black, stout bill. Both males and females share similar coloration and markings, with little sexual dimorphism.


The Black-crowned Night Heron primarily feeds on fish, crustaceans, amphibians, insects, and other aquatic invertebrates. It may also consume small mammals, birds, and reptiles. The bird is an ambush predator that waits motionless at the water’s edge or wades slowly through shallow water, using its sharp bill to capture prey.

Reproduction and Lifecycle:

The breeding season for the Black-crowned Night Heron typically occurs between April and August, depending on the location. These birds are colonial nesters, often forming mixed-species colonies with other herons and egrets. They build platform nests made of sticks and other plant materials, usually placed in trees, shrubs, or on the ground near water.

The female lays 3 to 5 pale blue-green eggs, which are incubated by both parents for around 21-25 days. After hatching, the chicks are fed and cared for by both parents until they fledge, or leave the nest, at about 6-7 weeks old. The young birds become fully independent within a few weeks of fledging.

Conservation Status:

The Black-crowned Night Heron is currently listed as “Least Concern” by the International Union for Conservation of Nature (IUCN) due to its wide distribution and stable population. The species is not facing any major threats at present. However, habitat loss due to wetland drainage, pollution, and human disturbance, as well as the use of pesticides, could pose potential risks to the Black-crowned Night Heron population in the future. Conservation efforts focus on habitat preservation and monitoring populations to ensure their long-term survival.

Updated: 20 April 2023 — 14:44

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