is a polytypic, black-billed, green conure with considerable variation in coloration. Its fourteen subspecies are distinguishable by the varied mixture of yellow and brown on their face and throat. The adults have a overall green plumage, but underneath they are paler and have more yellow. has a narrow eye-ring that is white in most subspecies but is occasionally black. Most of the subspecies feature a larger, yellow ring of feathers surrounding the eye. Its forehead, face, and chin are an orange-yellow. Crown and upper breast are a brownish-green. The green flight feathers and tail are rimmed and tipped in blue. Their iris is yellow and their legs are gray. displays no sexual dimorphism in that the males are larger than the females. Adult brown-throated parakeets can weigh between 76 and 102 g and average 25 cm in length.
Juveniles tend to lack the intense yellow that is vivid in adult individuals. Their forecrown is a dark greenish-blue. The throat and breast are greenish, while the belly is green with some orange or yellow. ("Supplementary Material 1", 2005; Biology Questions and Answers, 2003; Forshaw, 1989; Forshaw, 2006; del Hoyo, et al., 1997)
Female brown-throated parakeets are responsible for incubation throughout the day. The male will meet up with her at night, however his specific role in incubation is unknown. Once the altricial nestlings hatch, both parents take part in feeding and tending the brood. Males continue to feed the young after they fledge. Juveniles may join the parents to form small family groups. (Avianweb.com, 2006; Forshaw, 2006)
Home ranges are variable depending upon the location and size of the colony. It is difficult to pinpoint an exact territory due to the fact that (Forshaw, 2006)is an avid flier, and encompasses a variety of habitats.
Brown-throated parakeets are generalist and consume seeds, fruits, nuts, blossoms, and occasionally insects. Feeding normally takes place during the day and is done in pairs or small flocks. Primary food sources includes seeds of Cassia and Acacia trees, fruit of Mangifera plants, and a variety of flowers. They forage in very vocal groups which often include macaws and Amazon parrots. Brown-throated parakeets are known crop pests, especially of maize in Columbia. They frequently raid the fruit plantations in the Netherlands Antilles, as well. (Forshaw, 2006; Harms and Eberhard, 2003; Juniper and Parr, 1998; del Hoyo, et al., 1997)
There are no records of predation upon feral house cats, burrowing owls, tropical screech owls, barn owls and snakes. Pearly-eyed thrashers are known destructive predators of the eggs and juvenile chicks of cavity-nesters. Red-tailed hawks are the largest significant danger to parrots in eastern Puerto Rico and likely pose a threat to local parakeet populations.but possible nocturnal predators consist of
The large roosts formed by brown-throated parakeets serve to avoid predation. Larger groups of birds have more eyes and ears for better detection of threats. In addition, roosts are normally found in shrubbery that is taller or denser than adjacent flora, thus making the birds difficult to reach. Brown-throated parakeets may take refuge in nests formed by termites, and the host insects inadvertently defend the parrot while defending their nest. (Harms and Eberhard, 2003; Wiley, 1993)
Nasutitermes costalis) though this seems to have little effect on the termites. The termites seal off the bird's nest from the rest of the colony and will move back into the cavity once the nest has been abandoned. The insects inadvertently protect nesting brown-throated parakeets from local predators, such as pearly-eyed thrashers (Margarops fuscatus). In the wild, is not a large competitor for food amongst other species. Brown-throated parakeets are prey to a number of larger birds, including red-tailed hawks (Buteo jamaicensis). Though this species is primarily a granivore, it also preys upon insect species and their larvae thus impacting their populations. As much of their diet is comprised of seeds, they likely are an important seed disperser for local flora. (Forshaw, 2006; Wiley, 1993)often nests within the nests of tree termites (
The raucous calls of brown-throated parakeets are quite noisy and aggravate nearby neighbors, whether in the wild or in captivity. They are also a prominent pest to local agriculture. The species has been known to cause severe destruction, specifically to maize crops. (Forshaw, 2006; Windsor Research Centre, 2010)
Brown-throated parakeets are not a globally endangered species. Aratinga pertinax margaritensis and the small island race Aratinga pertinax tortugensis. Aratinga pertinax tortugensis is also vulnerable to harsh climate changes. (Juniper and Parr, 1998; del Hoyo, et al., 1997)is locally abundant in Panama. The species is considered to be the most plentiful parrot in the Caribbean lowlands, llanos in Colombia, Guyana, North Surinam and all three of the Netherlands Antilles islands. A density of five to eighty-nine birds per square kilometer has been estimated in regions of northwest Venezuela. It is believed that mainland populations are increasing their ranges in response to increased forest conversion to ranchland. This species is often captured for marketing purposes, but there have been no severe implications with the exception of the subspecies
Rachel Markowitz (author), University of Michigan-Ann Arbor, Phil Myers (editor), University of Michigan-Ann Arbor.
living in the southern part of the New World. In other words, Central and South America.
uses sound to communicate
living in landscapes dominated by human agriculture.
young are born in a relatively underdeveloped state; they are unable to feed or care for themselves or locomote independently for a period of time after birth/hatching. In birds, naked and helpless after hatching.
Referring to an animal that lives in trees; tree-climbing.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
uses smells or other chemicals to communicate
used loosely to describe any group of organisms living together or in close proximity to each other - for example nesting shorebirds that live in large colonies. More specifically refers to a group of organisms in which members act as specialized subunits (a continuous, modular society) - as in clonal organisms.
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
parental care is carried out by females
union of egg and spermatozoan
forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.
an animal that mainly eats seeds
An animal that eats mainly plants or parts of plants.
referring to animal species that have been transported to and established populations in regions outside of their natural range, usually through human action.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
Having one mate at a time.
having the capacity to move from one place to another.
the area in which the animal is naturally found, the region in which it is endemic.
reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.
the business of buying and selling animals for people to keep in their homes as pets.
scrub forests develop in areas that experience dry seasons.
remains in the same area
reproduction that includes combining the genetic contribution of two individuals, a male and a female
associates with others of its species; forms social groups.
living in residential areas on the outskirts of large cities or towns.
uses touch to communicate
Living on the ground.
the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.
A terrestrial biome. Savannas are grasslands with scattered individual trees that do not form a closed canopy. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.
A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. See also Tropical savanna and grassland biome.
A terrestrial biome found in temperate latitudes (>23.5° N or S latitude). Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Fire and grazing are important in the long-term maintenance of grasslands.
uses sight to communicate
breeding takes place throughout the year
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