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Gouldian finch

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The Gouldian finch, also known as the rainbow finch or Gould's finch, is a brightly colored passerine bird.

Erythrura gouldiae -Frankfurt Zoo -black headed-8a-3cp
Erythrura gouldiae -Frankfurt Zoo -black headed-8a-3cp

This species is native to the northern regions of Australia. It is specifically found in the Kimberley and the Northern Territory. These birds are highly valued for their striking appearance. They are popular in aviculture, which is the practice of keeping and breeding birds. This popularity has led to successful captive breeding populations in many different countries around the world.

Both male and female Gouldian finches possess vibrant colors. They feature markings of black, green, yellow, and red. However, the sexes show specific differences in their plumage. Males possess a purple chest, while females have a lighter mauve chest. The birds also have several prominent rounded tubercles near the gape, which is the opening of the mouth. These tubercles have an opalescent lustre. While some incorrectly call them phosphorescent, scientific evidence suggests they merely reflect light rather than producing their own.

Dietary habits are essential to the survival of the Gouldian finch. These birds are seed eaters that consume up to 30% of their bodyweight every day. Their food sources change depending on the season. During the breeding season, they focus on ripe and half-ripe grass seeds from sorghum. In the wet season, spinifex grass seeds are a vital part of their diet. During the dry season, they become more nomadic. They forage on the ground for various seeds to find enough nutrition and water.

YoungGouldianFinch
YoungGouldianFinch

Breeding involves complex social behaviors and specific environmental needs. Males court females by bobbing and ruffling their feathers. They expand their chests and fluff their forehead feathers to display their colors. The birds typically build nests in tree hollows during the early dry season. A female lays a clutch of 4 to 8 eggs. Both parents participate in brooding the eggs during the day. The female remains on the eggs throughout the night. Once the chicks hatch, both parents provide care. The young leave the nest between 19 and 25 days after hatching. They reach full independence by 40 days of age.

Diamant de Gould oisillons
Diamant de Gould oisillons

Researchers have discovered a unique way these birds manage genetic health. In Northern Australia, females can influence the sex of their offspring. They do this by choosing mates based on head color. If a female mates with a male of a different head color, a genetic incompatibility can occur. This can lead to a mortality rate of up to 80% in female offspring. To counter this, females may produce a ratio of up to four males for every one female. This is a rare, proven instance of birds biasing offspring sex to overcome genetic weaknesses.

YoungGouldianFinch
YoungGouldianFinch

The history of the Gouldian finch involves significant scientific study and human impact. British ornithologist John Gould described the species in 1844. He named it *Amadina gouldiae* to honor his deceased wife, Elizabeth. He received specimens from the naturalist Benjamin Bynoe. In the past, the species was heavily trapped for the pet trade. Between 1934 and 1939, it was one of the most exported finches. For example, the Perth Zoo exported 12,509 Gouldian finches during that period. Licensed trapping in Western Australia finally ended on November 15, 1981.

Conservation is a major concern for wild populations. In the early 20th century, hundreds of thousands of these birds existed in the wild. By the 1980s, the population had plummeted to 2,500 or fewer. This decline was largely caused by human-induced habitat loss. Extensive wildfires during the late dry season pose a primary threat today. These fires destroy the tree hollows needed for nesting. They also consume the seeds that make up the birds' main diet. Cyclones and climate change also reduce the availability of nesting sites. While the IUCN Red List currently lists them as Least Concern, they have faced many previous threats and endangered statuses.

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File:Erythrura gouldiae -Frankfurt Zoo -black headed-8a-3cp.jpg
Erythrura gouldiae -Frankfurt Zoo -black...
File:Diamant de Gould oisillons.jpg
Diamant de Gould oisillons.jpg
File:YoungGouldianFinch.jpg
YoungGouldianFinch.jpg
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