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Blue-and-yellow macaw (Ara ararauna)
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Macaw, common name of about 18 species
of large colourful parrots
native to tropical North and South America. These brightly coloured
long-tailed birds are some of the most spectacular parrots in the
world. Macaws are classified in the genera Ara, Anodorhynchus,
Cyanopsitta, Primolius, Orthopsittaca, and Diopsittaca
in the family Psittacidae.
Both male and female macaws look alike, which is uncommon among
vividly coloured birds. The cobalt-blue hyacinth
macaw (Anodorhynchus hyacinthinus) of Brazil,
Bolivia,
and Paraguay
is the largest of all parrots, measuring 95100 cm (37.539.5
inches) long. The scarlet
macaw (Ara macao) is probably the best-known New World
parrot.
Its brilliant red, yellow, and blue plumage contrasts with a bare
white face that may blush when the bird
is excited. Flying
with distinctive slow wingbeats and their long tails trailing, scarlet
macaws are most often seen flying to and from roosting and feeding
sites in pairs, family groups, or flocks. These gregarious
birds can often be heard calling in flight, emitting loud metallic
screeches.
With their large sickle-shaped beaks,
macaws can crack open hard-shelled seeds
and nuts, dislodging the nutmeat with their blunt muscular tongues.
The beak also serves as a third foot as the macaw climbs about in
trees searching for seeds, as well as fruits,
flowers,
and leaves.
One species, the blue-and-yellow
macaw (Ara ararauna), has been recorded eating at least
20 species of plants,
including many toxic to humans.
In Manú
National Park in Peru,
the members of five macaw species converge by the hundreds at mineral-rich
riverbanks to eat the clay
there, which may help them detoxify compounds in their diet. Macaws
nest in tree hollows; hyacinth macaws sometimes nest in riverbank
holes.
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Kinesis of the cranium
of a macaw with upper mandible lowered (left), with upper
mandible raised (centre), and with forces acting upon the
mandible (right).
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Macaws are easily tamed, and some can mimic sounds.
Although these parrots often shriek noisily, gnaw, and occasionally
bite with their powerful beaks, many local people keep them as pets.
A few macaws have survived to 65 years old in captivity.
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Blue-and-yellow macaw
(Ara ararauna).
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Macaws are also exported, often illegally, to supply the worldwide
pet trade. This practice, along with land clearing and logging,
has contributed to many macaws (as well as other parrots)
increasing rarity in the wild. The IUCN
Red List of Threatened Species lists several macaws as either
endangered or critically endangered. Species at the greatest risk
of extinction
include the blue-throated macaw (Ara glaucogularis) of northern
Bolivia, the great green macaw (Ara ambiguus) of northern
Colombia and Central
America, and Lears macaw (Anodorhynchus leari)
of Brazil. The most recent confirmed sighting of a non-captive Spixs
macaw (Cyanopsitta spixii)the bird that inspired the
popular childrens films Rio
(2011) and Rio 2 (2014)occurred in 2000, and the International
Union for Conservation of Nature (IUCN) and other authorities
considered the species extinct in the wild by 2018. In addition,
ornithologists hold out hope that small populations of the glaucous
macaw (Anodorhynchus glaucus), which has been listed by the
IUCN as a critically endangered
species since 2000, continue to persist; the species was last
observed in central South
America in the 1960s, and several unconfirmed sightings of individuals
have been reported since then.
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