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Night monkeys have large eyes which improve their vision at night, while their ears are mostly hidden, giving them their name Aotus, meaning "earless". Night monkeys are the only truly nocturnal monkeys with the exception of some cathemeral populations of Azara's night monkey , who have irregular bursts of activity during day and night.
Night vision is the ability to see in low-light conditions, ... and monkeys, lack a tapetum ... night glasses were the only method of night vision, and thus were ...
There are two noteworthy genera within the New World monkeys that exhibit how different environments with different selective pressures can affect the type of vision in a population. [7] For example, the night monkeys (Aotus) have lost their S photopigments and polymorphic M/L opsin gene. Because these anthropoids are and were nocturnal ...
X-Ray Specs were improved (U.S. patent 3,592,533) by Harold von Braunhut, also the inventor of Amazing Sea-Monkeys. [4] A previous product called the Wonder Tube worked similarly. Instead of glasses, the device was in the form of a small telescope. Their name was used as the inspiration for the UK punk band X-Ray Spex.
The black-headed night monkey (Aotus nigriceps) is a night monkey species from South America.It is found in Brazil, Bolivia and Peru. [2] The A. nigriceps in Peru were notably inhabiting areas that were degraded, and often these areas were disturbed either by human activities or natural occurrences in the ecosystem. [3]
Hernández-Camacho's night monkey (Aotus jorgehernandezi) is a species of night monkey of the family Aotidae. It was first described in 2007 by Thomas Defler and Marta Bueno. It has a gray neck and a white patch over each eye, separated by a black band. The fur on the chest, belly, lower arms and lower wrists is thick and white.
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The Panamanian night monkey is a relatively small monkey, with males weighing approximately 889 grams (31.4 oz) and females weighing about 916 grams (32.3 oz). [6] The fur on the back ranges from grayish brown to reddish brown.