The Neotropic Cormorant (*Nannopterum brasilianum*) is a sleek, dark waterbird found from the southern United States through Central and South America, distinguished by its slender, hooked bill and a distinctive white border on its throat pouch during breeding season. Unlike its larger cousin, the Double-crested Cormorant, this species has a longer tail and a noticeably thinner neck, giving it a more serpentine profile as it perches with wings spread to dry after diving. A remarkable special feature is its ability to hunt cooperatively in synchronized groups, herding fish into shallow water with precision, while its fully webbed feet and dense, waterlogged feathers allow it to pursue prey underwater with astonishing agility.

Fun Facts

Unlike many cormorants, the Neotropic Cormorant has a peculiar habit of perching with its wings fully spread for extended periods, not just after fishing, but also as a territorial display to intimidate rivals. It’s one of the few cormorant species that occasionally uses a “foot-paddling” technique, rapidly shuffling its feet in shallow water to flush out hidden prey. During breeding, adults develop a striking white tuft on the sides of their head and a bright blue patch of skin on their throat, which fades almost immediately after the season ends. They are also known to dive up to 10 meters deep, using their webbed feet for propulsion and their hooked bill to snatch fish with surprising precision, even in murky water.

Habitats & Distribution

The Neotropic Cormorant is widely distributed from the southern United States through Central and South America, reaching as far south as Tierra del Fuego and the Falkland Islands. It inhabits a broad range of freshwater and coastal environments, including rivers, lakes, marshes, mangrove swamps, estuaries, and sheltered bays, where it prefers open water with nearby perching sites such as trees, rocks, or human-made structures. This adaptable species is also commonly found in artificial habitats like reservoirs, irrigation canals, and urban waterways, avoiding only fast-moving currents and deep oceanic waters.

Behaviours & Reproduction

Highly social, Neotropic Cormorants breed in dense colonies, often alongside other waterbirds like herons and egrets. Their mating system is monogamous for a single season, with pairs forming through elaborate courtship displays on land or at the nest site, which include wing-waving, bowing, and bill-grasping. The male typically selects a nest location and gathers nesting material, which the female then arranges. Both parents share incubation duties for approximately 25-30 days, and after hatching, they feed the altricial young through regurgitation. A unique reproductive strategy is their use of communal nesting platforms, sometimes reusing and reinforcing old nests year after year, which can lead to large, multi-layered colonies that help protect against predators. Chicks fled the nest at around 6 weeks but remain dependent on parents for several more weeks, often forming crèches with other juveniles for safety while the adults forage.

Diet

The Neotropic Cormorant is an opportunistic piscivore, with fish forming the vast majority of its diet, though it also consumes amphibians, crustaceans, and aquatic insects. An interesting fact about its feeding behavior is that it is a highly efficient "pursuit diver," using its powerful webbed feet to propel itself underwater and its hooked bill to spear or grasp slippery prey. Unlike many other seabirds, its feathers are not fully waterproof, which allows water to penetrate the plumage and reduce buoyancy, enabling it to dive deeper and stay submerged longer—often for 30 to 60 seconds. Furthermore, Neotropic Cormorants are known to forage cooperatively, forming large flocks that herd schools of small fish into shallow areas where they can be more easily captured.

Colors

The Neotropic Cormorant is predominantly black with a slightly bronzed or iridescent greenish gloss on its back and wings. Adults have a distinctive white throat patch bordered by a yellow-orange gular pouch, and during breeding season they develop fine white filoplumes on the neck and a tuft of white feathers behind the eye. Its bare facial skin is dark, and the bill is slender and hooked. This dark plumage serves as camouflage against dark water and shadows when swimming low, while the white throat patch may aid in species recognition.