American flamingo
The American flamingo is a large species of flamingo native to the West Indies, northern South America and the Yucatán Peninsula. It is closely related to the greater flamingo and Chilean flamingo, and was formerly considered conspecific with the greater flamingo, but that treatment is now widely viewed as incorrect due to a lack of evidence. It is also known as the Caribbean flamingo, although it is also present in the Galápagos Islands. It is the only flamingo that naturally inhabits North America along with the Neotropical realm.
It is a cultural icon for the U.S. state of Florida, where it was formerly abundant in the southernmost regions, although it was largely extirpated by 1900 and is now only an uncommon visitor with a few small, potentially resident populations.
Taxonomy
The American flamingo was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae under the current binomial name Phoenicopterus ruber. Linnaeus cited earlier authors including the English naturalist Mark Catesby who in 1729–1731 had described and illustrated the flamingo found on the Bahamas islands. Linnaeus specified the type locality as "Africa, America, rarius in Europe" but the locality was restricted to the Bahamas by the German ornithologist Hans von Berlepsch in 1908. The genus name Phoenicopterus is the Latin word for a flamingo. The specific epithet ruber is Latin meaning "red". The greater flamingo, that is widespread in the Old World, was formerly treated as a subspecies of the American flamingo. Molecular phylogenetic studies have shown that the two taxa are each other's closest relatives.Two subspecies are recognised:
- P. r. ruber Linnaeus, 1758 – Caribbean to northeast Brazil
- P. r. glyphorhynchus Gray, GR, 1869 – Galápagos Islands
Distribution
Marine biologists say that, although flamingos are native to the tropical south of the U.S., hurricanes have been known to drive flocks of flamingos north, leading to rare sightings in Kentucky, New York, Ohio, Pennsylvania and Virginia. Most of the birds return to where they came from, but occasionally, one breaks off from a flock so that there are examples of a flamingo hanging out by itself for years.
Its preferred habitats are similar to those of its relatives: saline lagoons, mudflats, and shallow, brackish coastal or inland lakes. An example habitat is the Petenes mangroves ecoregion of the Yucatán.
In Florida
The American flamingo is considered an iconic symbol of the state of Florida in the United States, and is widely featured on merchandise from the state. Although the species was a former resident and a possible breeder in Florida until the early 20th century, the strong association of flamingos with Florida likely originates from the Flamingo Hotel, a popular 1920s hotel in Miami Beach, which was named after an exotic bird for marketing purposes. The hotel's strong association with South Florida led to the popularity of flamingo souvenirs from the state, which was further boosted by the captive flamingos kept in Hialeah Park.South Florida and the Florida Keys were likely the northernmost strongholds of the American flamingo's distribution until they suffered a population collapse around 1900. Large flocks of flamingos reaching up to a thousand individuals were sighted throughout the 19th century by naturalists such as John James Audubon and John George F. Wurdemann although such spectacles were restricted to a small portion of southern and western Florida, at sites including Marco Island, Cape Sable and the Florida Keys. Many of these early reports note that Florida's flamingos suffered from heavy hunting, first by Native Americans and later early settlers; this hunting may have already affected numbers prior the earliest population estimates. The last report of a large flock was by Reginald Heber Howe, who reported a flock of over 500 to 1,000 flamingos east of Cape Sable. Following this report, flamingo observations in Florida only ranged in the single digits at a time for many decades.
A small number of museum specimens exist of flamingo eggs allegedly collected in Florida, all from the 1880s. Three of these are labeled as originating from the Florida Keys, while one is labeled as having been collected around Tampa. However, none of these specimens have specific collection notes, and the provenance of the Tampa specimen is considered highly erroneous. However, the collection dates are consistent with nesting seasons for other American flamingo populations, bolstering their accuracy. There is a single potential sight record of nesting flamingos in Florida: a 1901 report from a Keys resident mentions a flock of 40–50 flamingos on Sugarloaf Key standing by "whitish stumps", which may potentially refer to the flamingos' mud nests. Despite the ambiguity of these reports, the geomorphology of these sites closely resembles that of flamingo nesting sites elsewhere in the Caribbean, supporting their accuracy. It is thus largely agreed that flamingos were likely former nesters in Florida.File:American Flamingo - Flickr - btrentler.jpg|left|thumb|A wild American flamingo in Florida Bay, Everglades National Park. Some Florida Bay birds are thought to be year-round residentsSightings of flamingos in Florida had reached a low by the 1940s, with no registered records for the entire decade. During the 1950s, wild flamingo sightings started to tick up again, but birds from the captive population at Hialeah Park frequently escaped, leading to the conclusion that the majority of flamingo sightings in Florida were of escapees; until 2018, the Florida Fish and Wildlife Conservation Commission listed it as a nonnative species. From a distance, untrained eyes can also confuse it with the roseate spoonbill, leading to further confusion. This belief persisted into the 21st century even as flamingo sightings started to become more and more frequent, although at least one bird banded as a chick in the Yucatán Peninsula was recorded in 2012 in Everglades National Park. The maximum sizes of observed flocks also increased over time, with the largest increase between 1990 and 2015. The largest flock of Florida flamingos since the early 20th century was spotted in 2014, when a very large flock of over 147 flamingos temporarily stayed at Stormwater Treatment Area 2 on Lake Okeechobee, with a few returning the following year.
A 2018 study confirmed the native status of flamingos in Florida and called for their federal protection as a threatened species, which had been debated by agencies during the prior decades. The study found that the growing flamingo sightings likely represent wild individuals and not escapes, and that at least some of these individuals are year-round residents in Florida. The status of flamingos as a former resident species was proven with the observations and breeding records by early naturalists, while the existence of modern resident populations was based on an abandoned young flamingo named Conchy found in Key West, who was radio-tagged and found to stay in Florida Bay year-round with other flamingos. The study also indicated that as flamingo populations around the Caribbean recover, more flamingos may join the resident populations and recolonize Florida, as has happened elsewhere in the Caribbean.
In 2023, Hurricane Idalia blew in large numbers of flamingos across the eastern United States, with records from Florida, Georgia, North Carolina, South Carolina, Virginia, Kentucky, Tennessee, as far north as Ohio and Pennsylvania, and as far northwest as Wisconsin. These vagrant populations likely originated from the Yucatán Peninsula, were caught in the storm while en route to Cuba, and carried until the storm's landfall in the United States, after which they dispersed.
Description
The American flamingo is a large wading bird with reddish-pink plumage. Like all flamingos, it lays a single chalky-white egg on a mud mound, between May and August; incubation until hatching takes from 28 to 32 days; both parents brood their young. They may reach sexual maturity between 3 and 6 years of age, though usually they do not reproduce until they are 6 years old. Their life expectancy of 40 years is one of the longest in birds.Adult American flamingos are smaller on average than greater flamingos, but are the largest flamingos in the Americas. They measure from tall. The males weigh an average of, while females average. Most of its plumage is pink, giving rise to its earlier name of rosy flamingo and differentiating adults from the much paler greater flamingo. The wing coverts are red, and the primary and secondary flight feathers are black. The bill is pink and white with an extensive black tip. The legs are entirely pink. The call is a goose-like honking.
It is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds applies.
Mating and bonding behaviors
Mating and bonding behaviors of P. ruber individuals have been extensively studied in captivity. The American flamingo is usually monogamous when selecting a nest site, and incubating and raising young; however, extra-pair copulations are frequent.While males usually initiate courtship, females control the process. If interest is mutual, a female walks by the male, and if the male is receptive, he walks with her. Both parties make synchronized movements until one member aborts this process. For low-intensity courtships, males and females walk in unison with their heads raised. In high-intensity courtships, males and females walk at a quick pace with their heads dropped in a false feeding posture. This high-intensity courtship stops at any point if either bird turns and the other does not follow, the heads are raised, unison movements are stopped, or the pace of movement is slowed. If the female is ultimately receptive to copulation, she stops walking and presents for the male. Long-term pairs do not frequently engage in courtship behaviors or in-group display. Pairs often stand, sleep, and eat in close proximity.
Courtship is most often seen among individuals that change partners often or are promiscuous. A spectrum of pairing relationships is seen. Some birds have a long-term partner throughout the year; others form pairs during periods of courtship and nest attendance. How long a relationship lasts is affected by many factors, including addition and removal of adults, maturation of juveniles, and occurrence of trios and quartets. In most pairs, both individuals usually construct and defend the nest site. In rare cases, one individual undertakes both duties. Within trios, the dominant pair begins the nesting process by choosing and then defending the site.For trios with one male and two females, the subordinate female is tolerated by the male, but often fights with the dominant female. If two females share a nest and both lay an egg, one female will try to destroy the other egg or roll it out of the nest. For trios with two males and one female, the subordinate male is tolerated by both individuals and often becomes the primary incubator and caregiver of the chicks. For quartets, the dominant male and two females take care of the nest, while the subordinate male remains around the periphery, never gaining access to the nest. Less animosity is observed between the dominant and subordinate females in quartets compared to trios.
The egg is attended constantly and equally by alternating parents. Chicks at the nest are attended constantly by alternating parents, up to 7–11 days of age. Most attentive periods during incubation and brooding last 21–60 hours, both in the case where the 'off-duty' parents remain in the same lagoon to feed, or, they fly to other lagoons to feed. Nest reliefs during incubation take place predominantly in late afternoon, or early morning.File:CaribFlamingosLOviedo1.jpg|thumb|A group of immature birds at Lago de Oviedo, Dominican RepublicThe time for receiving food from parents decreases from hatching to about 105 days, and the decrease is greatest after the chicks have left the nest at 7–11 days to band into crèches. The frequency and the duration of feeds by male and female partners do not differ significantly. After chicks have left the nest, feeds are predominantly nocturnal.