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Male in Karratha, Western Australia. The Australian zebra finch (Taeniopygia castanotis) [2] is the most common estrildid finch of Central Australia.It ranges over most of the continent, avoiding only the cool humid south and some areas of the tropical far north.
The Australian zebra finch is used worldwide in several research fields (e.g. neurobiology, physiology, behaviour, ecology and evolution) as individuals are easy to maintain and breed in captivity. [12] Zebra finches are more social than many migratory birds, generally traveling in small bands and sometimes gathering in larger groups. [13]
Only male zebra finches sing. [4] Each finch has an individual song. [ 4 ] Between the ages of 25 and 90 days old, young zebra finches learn to sing by copying the songs of adults, and sometimes by copying the songs of other juveniles.
Adult neurogenesis is the process in which new neurons are born and subsequently integrate into functional brain circuits after birth and into adulthood. Avian species including songbirds are among vertebrate species that demonstrate particularly robust adult neurogenesis throughout their telencephalon, in contrast with the more limited neurogenic potential that are observed in adult mammals ...
Alternatively, the distribution of male and female tissue can be more haphazard. Bilateral gynandromorphy arises very early in development, typically when the organism has between 8 and 64 cells. [25] Later stages produce a more random pattern. [citation needed] A notable example in birds is the zebra finch.
Female birds are able to produce more of a certain gender of birds that are more likely to survive under extreme conditions. In birds, the females' egg determines the gender of the offspring, not the male's sperm. In zebra finches, a study showed the effect of food on gender ratio production. For females, egg production is a metabolically ...
In one experimental population of zebra finches, there was increased singing activity by the male after breeding. [9] This increase is positively correlated with the partner's reproductive investment. The female finches were bred in cages with two subsequent males that differed with varying amounts of song output.
Male Guianan cock-of-the-rock, distributed in the mountainous regions of Guyana, eastern Colombia, southern Venezuela, Suriname, French Guiana and northern Amazonian Brazil, "delight in homosexuality" with almost 40 percent engaging in a form of homosexual activity and a small percentage never copulating with females. [11] [12]