Lear's macaw: Difference between revisions
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The '''Lear's Macaw''' |
The '''Lear's Macaw''' (''Anodorhynchus leari''), also known as the '''Indigo Macaw''', is a rare [[Brazil]]ian [[parrot]] with a highly restricted range. It is metallic blue with a faint, often barely visible, tinge of green, and a yellow patch of skin at the base of the heavy, black bill. It weighs around 950 g (2 pounds) and is 75 cm (30 inches) long. It was named after the poet [[Edward Lear]], who published many drawings and paintings of parrots. Although Lear never visited Brazil (or anywhere else in [[South America]]), several of his "Illustrations of the Family of the Psittacidæ, or Parrots" strongly resemble this species, unrecognized until much later, believing it to be a [[Hyacinth Macaw]] — a species which is larger, darker, and has a differently shaped patch of yellow skin at the base of the bill. |
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==History== |
==History== |
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For over a century after |
For over a century after it had been described, the whereabouts of the wild population was unknown. It was eventually rediscovered in [[1978]] by [[ornithologist]] [[Helmut Sick]] in [[Bahia]] in the interior northeast of Brazil. Some thought the bird was a [[Hybrid (biology)|hybrid]] or variant involving the similar Hyacinth Macaw. However, this idea was soon abandoned, as both [[plumage]], size and proportions of the Lear's Macaw differ from those of its close relatives. The Lear's Macaw was actually first seen by the public in [[1950]] in a Brazilian zoo. |
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==Habitat== |
==Habitat== |
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The Lear's Macaw lives in stands of [[licuri]] [[Arecaceae|palm]], the nuts of which form a prominent part of its diet. This [[habitat (ecology)|habitat]], while never plentiful, is currently estimated to be around 1.6% of its original cover. The Lear's Macaw also requires a sandstone cliff in which to nest. In order to nest there, they apply their saliva to the sandstone, softening it, and then |
The Lear's Macaw lives in stands of [[licuri]] [[Arecaceae|palm]], the nuts of which form a prominent part of its diet. This [[habitat (ecology)|habitat]], while never plentiful, is currently estimated to be around 1.6% of its original cover. The Lear's Macaw also requires a sandstone cliff in which to nest. In order to nest there, they apply their saliva to the sandstone, softening it, and then excavate small crevasses by using their beaks and shooting the dust out of their soon-to-be nests with their feet. |
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===Conservation=== |
===Conservation=== |
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The population of the Lear's Macaw, as of [[1994]], was 140 birds. As reported by the [[American Bird Conservancy]] and [http://www.biodiversitas.org.br Fundação Biodiversitas], the population of the Lear's Macaw rose to 751 birds as of July [[2007]]. |
The population of the Lear's Macaw, as of [[1994]], was 140 birds. As reported by the [[American Bird Conservancy]] and [http://www.biodiversitas.org.br Fundação Biodiversitas], the population of the Lear's Macaw rose to 751 birds as of July [[2007]].<ref name= ABC>[http://www.abcbirds.org/newsandreports/releases/070718.html Lear's Macaw Making a Remarkable Comeback in Protected Reserve] American Bird Conservancy. Press Release from 18 July 2007</ref> It is currently listed as [[Critically Endangered]] ([[CITES]] I). As well as [[habitat loss]], the Lear's Macaw has historically suffered from hunting and, more recently, trapping for the [[aviary]] trade. In addition, the cows that live near its nesting grounds often stand on the roots of the licuri palms that they eat, causing a large loss of food for these birds. In fact, though the average life span of these trees can be 30-50 years for healthy adult trees, most baby palms barely make it over 8-10 years.<!-- contradictionary: Average life span 30-50 years... most barely make it over 8-10 years??? --> Many organizations, such as [[Fundação Biodiversitas]], BioBrazil, Parrots International, and the Lymington Foundation, along with local ranchers and other independent organizations, are working to help conserve the species. Biodiversitas created the [[Canudos Biological Station]], in 1993, to protect the sandstone cliffs used by the macaws. |
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It is currently listed as Critically Endangered ([[CITES]] I). As well as [[habitat loss]], the Lear's Macaw has also historically suffered from hunting and, more recently, trapping for the aviary trade. In addition, the wild cows that live near its nesting grounds often stand on the roots of the [[licuri]] palms that they eat, causing a large loss of food for these majestic birds. In fact, though the average life span of these trees can be 30-50 years for healthy adult trees, most baby palms barely make it over 8-10 years. Many organizations, such as Fundacao Biodiversitas, BioBrazil, Parrots International, and the Lymington Foundation, along with local ranchers and other independent organizations, are working to help conserve the species. Biodiversitas created the Canudos Biological Station, in 1993, to protect the sandstone cliffs used by the macaws. |
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All present Lear's Macaw conservation projects are managed under the authority of IBAMA |
All present Lear's Macaw conservation projects are managed under the authority of [[IBAMA]]. The Committee For The Conservation And Management Of The Lear's Macaw advises IBAMA on the conservation of the Lear's Macaw. Participation in the Committee is by invitation by IBAMA and includes Brazilian and international organizations and individuals. |
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From the |
From the American Bird Conservancy 18 July 2007 Press Release:<ref name= ABC/> |
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<blockquote>''The count of the Lear's Macaw population was undertaken by Fundação Biodiversitas staff in June 2007 at the Canudos Biological Station in Brazil, a reserve supported by ABC. A total of 751 individuals were counted as they flew out of the canyons where they roost and nest to their licuri palm feeding areas. The global population in 1987 was just 70 birds, the 2003 census was 455, and until last month’s count, the current population was estimated at 600.''</blockquote> |
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==Behavior== |
==Behavior== |
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Lear's Macaw has interesting ways that they adapt to their environment in which they live. For example, when a group of macaws are searching for food or a new nesting ground, a small advance party of males will "scout out" the approaching terrain, for the safety of the rest of the group. In addition, when danger is found on these hunts for new territory, the macaws will let out their signature call, which can be heard for miles. Then, to escape, the macaw can reach flight speeds of up to 35 miles per hour to escape predators or poachers. |
Lear's Macaw has interesting ways that they adapt to their environment in which they live. For example, when a group of macaws are searching for food or a new nesting ground, a small advance party of males will "scout out" the approaching terrain, for the safety of the rest of the group. In addition, when danger is found on these hunts for new territory, the macaws will let out their signature call, which can be heard for miles. Then, to escape, the macaw can reach flight speeds of up to 35 miles per hour to escape predators or poachers.{{Fact|date=June 2008}} |
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===Breeding=== |
===Breeding=== |
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The |
The Lear's Macaw’s rate of reproduction is 1-2 eggs per year during their mating season from December to May. However, not all pairs of birds mate often or at all. Lear's Macaws reach sexual maturity at around 2-4 years of age, but its life span can be anywhere from 30-50 years or more. |
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==References== |
==References== |
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*ARKive - [http://www.arkive.org/species/GES/birds/Anodorhynchus_leari/ images and movies of the Lear's macaw ''(Anodorhynchus leari)''] |
*ARKive - [http://www.arkive.org/species/GES/birds/Anodorhynchus_leari/ images and movies of the Lear's macaw ''(Anodorhynchus leari)''] |
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*[http://www.birdlife.org/datazone/search/species_search.html?action=SpcHTMDetails.asp&sid=1544&m=0 BirdLife Species Factsheet] |
*[http://www.birdlife.org/datazone/search/species_search.html?action=SpcHTMDetails.asp&sid=1544&m=0 BirdLife Species Factsheet] |
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*http://www.abcbirds.org/media/releases/lears_comeback.htm American Bird Conservancy Press Release from 18 July 2007: "Lear’s Macaw Making a Remarkable Comeback in Protected Reserve" |
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*http://www.biodiversitas.org.br Estação Biológica de Canudos - Home of the Indigo Macaw. |
*http://www.biodiversitas.org.br Estação Biológica de Canudos - Home of the Indigo Macaw. |
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Revision as of 00:00, 18 June 2008
| Lear's Macaw | |
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| File:Indigomacaw.jpg | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
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| Family: | |
| Genus: | |
| Species: | A. leari
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| Binomial name | |
| Anodorhynchus leari Bonaparte, 1856
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The Lear's Macaw (Anodorhynchus leari), also known as the Indigo Macaw, is a rare Brazilian parrot with a highly restricted range. It is metallic blue with a faint, often barely visible, tinge of green, and a yellow patch of skin at the base of the heavy, black bill. It weighs around 950 g (2 pounds) and is 75 cm (30 inches) long. It was named after the poet Edward Lear, who published many drawings and paintings of parrots. Although Lear never visited Brazil (or anywhere else in South America), several of his "Illustrations of the Family of the Psittacidæ, or Parrots" strongly resemble this species, unrecognized until much later, believing it to be a Hyacinth Macaw — a species which is larger, darker, and has a differently shaped patch of yellow skin at the base of the bill.
History
For over a century after it had been described, the whereabouts of the wild population was unknown. It was eventually rediscovered in 1978 by ornithologist Helmut Sick in Bahia in the interior northeast of Brazil. Some thought the bird was a hybrid or variant involving the similar Hyacinth Macaw. However, this idea was soon abandoned, as both plumage, size and proportions of the Lear's Macaw differ from those of its close relatives. The Lear's Macaw was actually first seen by the public in 1950 in a Brazilian zoo.
Habitat
The Lear's Macaw lives in stands of licuri palm, the nuts of which form a prominent part of its diet. This habitat, while never plentiful, is currently estimated to be around 1.6% of its original cover. The Lear's Macaw also requires a sandstone cliff in which to nest. In order to nest there, they apply their saliva to the sandstone, softening it, and then excavate small crevasses by using their beaks and shooting the dust out of their soon-to-be nests with their feet.
Conservation
The population of the Lear's Macaw, as of 1994, was 140 birds. As reported by the American Bird Conservancy and Fundação Biodiversitas, the population of the Lear's Macaw rose to 751 birds as of July 2007.[2] It is currently listed as Critically Endangered (CITES I). As well as habitat loss, the Lear's Macaw has historically suffered from hunting and, more recently, trapping for the aviary trade. In addition, the cows that live near its nesting grounds often stand on the roots of the licuri palms that they eat, causing a large loss of food for these birds. In fact, though the average life span of these trees can be 30-50 years for healthy adult trees, most baby palms barely make it over 8-10 years. Many organizations, such as Fundação Biodiversitas, BioBrazil, Parrots International, and the Lymington Foundation, along with local ranchers and other independent organizations, are working to help conserve the species. Biodiversitas created the Canudos Biological Station, in 1993, to protect the sandstone cliffs used by the macaws.
All present Lear's Macaw conservation projects are managed under the authority of IBAMA. The Committee For The Conservation And Management Of The Lear's Macaw advises IBAMA on the conservation of the Lear's Macaw. Participation in the Committee is by invitation by IBAMA and includes Brazilian and international organizations and individuals.
From the American Bird Conservancy 18 July 2007 Press Release:[2]
The count of the Lear's Macaw population was undertaken by Fundação Biodiversitas staff in June 2007 at the Canudos Biological Station in Brazil, a reserve supported by ABC. A total of 751 individuals were counted as they flew out of the canyons where they roost and nest to their licuri palm feeding areas. The global population in 1987 was just 70 birds, the 2003 census was 455, and until last month’s count, the current population was estimated at 600.
Behavior
Lear's Macaw has interesting ways that they adapt to their environment in which they live. For example, when a group of macaws are searching for food or a new nesting ground, a small advance party of males will "scout out" the approaching terrain, for the safety of the rest of the group. In addition, when danger is found on these hunts for new territory, the macaws will let out their signature call, which can be heard for miles. Then, to escape, the macaw can reach flight speeds of up to 35 miles per hour to escape predators or poachers.[citation needed]
Breeding
The Lear's Macaw’s rate of reproduction is 1-2 eggs per year during their mating season from December to May. However, not all pairs of birds mate often or at all. Lear's Macaws reach sexual maturity at around 2-4 years of age, but its life span can be anywhere from 30-50 years or more.
References
- ^ Template:IUCN2006 Database entry includes a range map and justification for why this species is critically endangered
- ^ a b Lear's Macaw Making a Remarkable Comeback in Protected Reserve American Bird Conservancy. Press Release from 18 July 2007
External links
- http://www.parrotsinternational.org/Species_Pages/Lears_photos_1.htm The Parrots International web site
- http://www.bluemacaws.org The Blue Macaws website
- ARKive - images and movies of the Lear's macaw (Anodorhynchus leari)
- BirdLife Species Factsheet
- http://www.biodiversitas.org.br Estação Biológica de Canudos - Home of the Indigo Macaw.