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The aye-aye is a nocturnal and arboreal animal meaning that it spends most of its life high in the trees. Although they are known to come down to the ground on occasion, aye-ayes sleep, eat, travel and mate in the trees and are most commonly found close to the canopy where there is plenty of cover from the dense foliage.
The aye-aye (Daubentonia madagascariensis) is the only extant member. However, a second species known as the giant aye-aye (Daubentonia robusta) lived until recently, becoming extinct within the last 1000 years. [2]
They are found exclusively on the island of Madagascar, primarily in forests but with some species also in savannas, shrublands, or wetlands. They range in size from the Margot Marsh's mouse lemur , at 8 cm (3 in) plus a 11 cm (4 in) tail, to the indri , at 90 cm (35 in) plus a 6 cm (2 in) tail.
The aye-aye is sometimes classified as a member of Lemuriformes, but others treat Chiromyiformes as a separate infraorder, based on their very reduced dental formula. [1] Gunnell et al. (2018) reclassified the putative bat Propotto as a close relative of the aye-aye, as well as assigning the problematic strepsirrhine primate Plesiopithecus to ...
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The aye-aye also has a large brain-to-body ratio, which may indicate a higher level of intelligence. [42] However, despite having a built-in tool in the form of its thin, elongated middle finger, which it uses to fish for insect grubs, the aye-aye has tested poorly in the use of extraneous tools.
A primate is a member of the biological order Primates, the group that contains lemurs, the aye-aye, lorisids, galagos, tarsiers, monkeys, and apes, with the last category including great apes. With the exception of humans, who inhabit every continent on Earth, most primates live in tropical or subtropical regions of the Americas, Africa and Asia.
The aye-aye also has two mammary glands, but they are located near the groin (inguinal). [124] In females, the clitoris is sometimes enlarged and pendulous, resembling the male penis, which can make sex identification difficult for human observers. [125] The clitoris may also have a bony structure in it, similar to the baculum (penis bone) in ...