Vautour noir

En bref

• Scientific Name: Coragyps atratus
• Spanish Name: Gallinazo
• Famille : Cathartidae
• Known Nicknames: American Black Vulture, Buzzard
• Average Length: 56–74 cm / 22–29 in
• Average Weight: 1.6–2.2 kg / 3.5–4.9 lb
• Wingspan: 133–167 cm / 52–66 in
• Key Feature: Sooty black plumage with a featherless dark-grey head and white wing-tip patches visible in flight
• Primary Diet: Scavenger (Carnivore)
• Range: Southeastern United States to Central Chile and Uruguay
• Habitat: Open landscapes, forest edges, and urban environments
• Social Structure: Highly Social (Gregarious)
• Nesting/Breeding: Ground, hollow logs, caves, or abandoned buildings
• Statut de conservation : Préoccupation mineure (LC)
• Évolution démographique : En hausse

The Black Vulture (*Coragyps atratus*) is a striking scavenger characterized by its soot-black plumage, short squared-off tail, and a distinctive featherless, wrinkled gray head that gives it a rugged, prehistoric appearance. While it lacks the keen sense of smell possessed by its relative, the Turkey Vulture, it compensates with exceptional eyesight and high social intelligence, often tailing other scavengers to locate a meal. In flight, this bird is easily identified by the brilliant silvery-white patches on its wingtips, which flash like stars against the sky as it performs its signature "flap-flap-glide" aerial rhythm. Notably, the Black Vulture lacks a syrinx, meaning it cannot sing; instead, it communicates through a series of eerie hisses and guttural grunts. Highly gregarious and fiercely loyal to family, these bold raptors play a vital ecological role as nature’s clean-up crew, maintaining a powerful and assertive presence within their communal roosts.

Faits amusants

These birds engage in the rather unsavory habit of urohidrosis, cooling themselves by defecating on their own legs to trigger evaporative cooling. Lacking a syrinx, the avian vocal organ, they are incapable of singing and instead communicate through eerie hisses and grunts. They are surprisingly social, often maintaining lifelong pair bonds and staying close to their adult offspring for years. When threatened, they utilize a gruesome defense mechanism: projectile vomiting putrid, semi-digested carrion to deter predators. Because they lack the keen sense of smell found in Turkey Vultures, they frequently act as "scavenger spies," following their cousins from high altitudes to locate hidden carcasses.

Habitats et répartition

This species maintains an extensive geographical range that spans from the northeastern United States and the Ohio Valley southward through Central America and into much of South America, reaching as far as central Chile and Argentina. While primarily a bird of warmer climates, its range has been gradually expanding northward into New England and the Great Lakes region in recent decades. These scavengers thrive in a diverse array of environments, typically favoring open landscapes that provide easy access to carrion. They are commonly found in lowland forests, swamps, brushlands, and agricultural fields, but they have also become highly successful in suburban and urban settings where human activity provides consistent food sources. They require relatively open areas for foraging while relying on dense thickets, hollow logs, or abandoned buildings for nesting, and tall trees or man-made structures for communal roosting.

Comportements & Reproduction

These highly gregarious birds maintain complex social structures, often gathering in large communal roosts and foraging in tight-knit family groups. Unlike many solitary raptors, they exhibit strong social bonds, with offspring frequently remaining with their parents for several years. This sociality extends to their feeding behavior, where they use a "follow-the-leader" strategy, trailing other scavengers to carcasses and then using their superior numbers and collective aggression to dominate the food source. During the breeding season, they form long-term monogamous pair bonds reinforced through elaborate courtship displays involving aerial chases and ground-based performances where pairs circle each other with spread wings and bobbing heads. They do not build traditional nests, instead laying eggs directly on the ground, in hollow logs, or within abandoned structures. Both parents share incubation duties and provide prolonged care for the chicks, feeding them via regurgitation and maintaining family ties long after the young have fledged.

Alimentation

The Black Vulture is a specialized scavenger whose diet consists predominantly of carrion, ranging from fish and small roadkill to large carcasses of livestock and deer. Unlike the Turkey Vulture, this species lacks a keen sense of smell and instead relies on its sharp eyesight or follows other vultures to locate food sources. An opportunistic feeder, it is known to supplement its diet with decaying vegetation, eggs, and human refuse found in landfills. A particularly distinctive aspect of its feeding behavior is its social aggression; Black Vultures often gather in large, boisterous groups to dominate a carcass, sometimes even killing small or weakened live animals such as newborn calves or turtles. To survive this hazardous diet, they possess incredibly corrosive stomach acid that neutralizes lethal pathogens like anthrax, cholera, and botulism, allowing them to play a vital role in cleaning the environment.

Couleurs

The Black Vulture is characterized by uniform sooty-black plumage and a bare, dark-gray wrinkled head and neck. Its most distinctive marking is a prominent silvery-white patch on the underside of each wingtip, visible only in flight. While its legs are naturally dark, they often appear chalky white from dried uric acid, and its overall dark coloration provides effective camouflage within the deep shadows of forest canopies.