Caribbean Flamingo

About the Caribbean flamingo

Also known as the American flamingo, the Caribbean flamingo is a large wading bird native to the West Indies, northern South America (including the Galápagos Islands), and the Yucatán Peninsula in Mexico. It is the only flamingo that occurs naturally in North America. It was formally described in 1758 by Carl Linnaeus, who cited earlier work by the English naturalist Mark Catesby describing flamingos on the Bahamas. For years it was treated as the same species as the greater flamingo of the Old World, but that view is now considered incorrect by, among others, the American and British Ornithologists' Unions; molecular studies confirm the two are each other's closest relatives but distinct species. Two subspecies are recognized: the nominate form ranging from the Caribbean to northeast Brazil, and a smaller, more sexually dimorphic form isolated on the Galápagos Islands.

Adults stand 47 to 57 inches (120–145 cm) tall, with reddish-pink plumage that gave rise to an old alternate name, "rosy flamingo," and that distinguishes adults from the much paler greater flamingo. The wing coverts are red and the flight feathers are black; the bill is pink and white with an extensive black tip, and the legs are entirely pink. Males average 6.2 pounds (2.8 kg) and females 4.9 pounds (2.2 kg). The species has evolved long legs and large webbed feet for wading and stirring up food from the bottom of shallow water, along with a downward-hooked bill lined with lamellae that filter differently sized food items — the exact shape of the bill shifting slightly depending on what's locally available to eat. It can hold its breath for extended periods while its head is submerged while feeding.

The Caribbean flamingo is a cultural icon of Florida, though its history there is one of near-disappearance and slow return. Large flocks — one report put a single sighting as high as 2,500 birds — were documented by naturalists including John James Audubon through the 19th century, concentrated at sites like Marco Island, Cape Sable, and the Florida Keys, but heavy hunting collapsed the population by around 1900, and sightings dwindled to single digits for decades, hitting zero recorded sightings in the 1940s. Escapees from a captive population at Miami's Hialeah Park further muddied the picture through the 20th century, and the state didn't officially recognize the flamingo as a native species again until 2018, when a study confirmed that a growing number of Florida sightings represented wild birds rather than escapees, including at least one year-round resident tracked in Florida Bay.

Behavior and diet

Caribbean flamingos are usually monogamous when it comes to choosing a nest site and raising young, though extra-pair mating is common. Courtship is initiated by males but controlled by females: if a female shows interest, she and the male perform synchronized walking displays with their heads raised for lower-intensity courtship, or a faster-paced, head-lowered "false feeding" walk for higher-intensity courtship, either of which can be broken off at any point by either bird. Long-established pairs display less and simply spend time standing, sleeping, and eating close together. Pairing arrangements vary widely, from long-term partners to birds that re-pair each season, and can extend to trios or quartets of adults sharing nesting duties, with dominant and subordinate roles determining who defends the nest and who ends up caring for chicks.

The species lays a single chalky-white egg on a mound of mud, and incubation lasts 28 to 32 days with both parents sharing the duty in alternating shifts, typically relieving each other in the late afternoon or early morning. Chicks are attended constantly by alternating parents for their first 7 to 11 days before banding together into crèches with other young birds; feeding by parents continues, becoming increasingly nocturnal after chicks leave the nest, and tapers off gradually over about 105 days. Flamingos reach sexual maturity between three and six years old, though most don't breed until they're six, and they can live around 40 years — one of the longest lifespans of any bird.

Diet is built around filter-feeding: small crustaceans, molluscs, worms, nematodes, insects and their larvae, small fish, seeds, algae, diatoms, and decaying leaves, along with mud that the birds consume for the microorganisms and bacteria it contains. What's actually available in the diet depends heavily on the exact shape of an individual's bill and on local conditions such as water temperature, depth, food supply, and the presence of vegetation, all of which shape where the birds choose to feed.

Range and habitat

The Caribbean flamingo breeds across the Galápagos Islands, coastal Colombia and Venezuela, and northern Brazil in South America; throughout the West Indies, including Trinidad and Tobago, Cuba, Jamaica, Hispaniola, the Bahamas, the Virgin Islands, and the Turks and Caicos; and along the northern coast of Mexico's Yucatán Peninsula. It formerly bred in southern Florida as well, and it turns up as a vagrant in Puerto Rico, Anguilla, Barbados, and Honduras. The Galápagos population is genetically distinct from Caribbean birds, and is notably smaller, shows sexual dimorphism in body shape, and lays smaller eggs.

Preferred habitat includes saline lagoons, mudflats, and shallow, brackish coastal or inland lakes, such as the Petenes mangroves of the Yucatán. Hurricanes have occasionally driven flocks well north of the species' usual range — Hurricane Idalia in 2023 scattered flamingos as far as Ohio, Pennsylvania, and Wisconsin, with most eventually returning south, though a few individuals have been known to remain alone, far from other flamingos, for years at a time.

Conservation status

The American flamingo, the species often called the Caribbean flamingo, is listed as Least Concern on the IUCN Red List, based on a 2021 BirdLife International assessment. Across its range in the Caribbean and northern South America, it is not currently considered at risk of extinction.

Its history in Florida is a different story. The species was likely a breeding resident there until a population collapse around 1900 driven by heavy hunting, after which sightings dropped to near zero for much of the 20th century, and the state classified it as nonnative until 2018.

A 2018 study confirmed the flamingo's native status in Florida, found that the growing number of sightings likely reflects wild birds rather than escapes from captivity, with at least some living in the state year-round, and called for federal protection of Florida's flamingos as a threatened species, a question agencies had debated for decades.