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2. link.springer.com › chapter › 10Visual System of the Only Nocturnal Anthropoid, Aotus - Springer

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   Sep 14, 2023 · In this chapter, we synthesize data from anatomy, neuroscience, psychophysics, genetics, and behavioral ecology to review the key adaptations of the owl monkey visual system for dim light vision. First, we review Aotus evolutionary history and highlight the dramatic variation available in light environments at night.

3. www.tropicalconservationfund.org › nightmonkeysLife History and Ecological Adaptations of Night Monkeys ...

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   Night monkeys have several adaptations that enable their nocturnal lifestyle. They possess large eyes with a high density of rod cells, enhancing their night vision. Their retinas are specialized for low-light conditions, allowing them to navigate and forage in the dark.

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5. en.wikipedia.org › wiki › Night_monkeyNight monkey - Wikipedia

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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.

6. www.iflscience.com › meet-the-owl-monkey-theMeet The Owl Monkey: The World’s Only Nocturnal Monkey ...

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   Mar 13, 2024 · The standout feature of these owl monkeys is their unusually large eyes, which evolved in response to a nocturnal lifestyle – they are the only new world monkeys to be active at night.

7. neprimateconservancy.org › night-monkeysNight Monkeys | New England Primate Conservancy

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   The soulful eyes of the Nancy Ma’s night monkey, also called the Ma’s Night Monkey or Peruvian red-necked owl monkeys, peer from the hollow of trees in the Amazonian neotropics of South America. They make their homes in rainforests that range from Northern Peru to Western Brazil.

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8. animaldiversity.org › accounts › Aotus_trivirgatusADW: Aotus trivirgatus: INFORMATION

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   Aotus trivirgatus differ from most nocturnal animals by having color vision. This fact, along with the structure of the eye, suggests that the ancestors of the night monkeys were diurnal. Though they have evolved very large eyes for low light conditions their activity is dependent on moonlight and their activity is limited on very dark nights.

9. People also ask

   Do owl monkeys have spherical eyes?

   • The lens of the eyes is more spherical than in monkey species that are active during the day, a chapter on nonhuman primates in the third edition of Laboratory Animal Medicine suggests. Most species of owl monkey live in pairs or in small family groups.

   Meet The Owl Monkey: The World’s Only Nocturnal Monkey Species

   www.iflscience.com/meet-the-owl-monkey-the-worlds-only-nocturnal-monkey-species-73369

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   Do Aotus trivirgatus have a hoot?

   • Since calls are not common among Aotus trivirgatus, a hoot usually indicates a lone male or female looking for a mate. Copulations generally take place at night, though they have been observed in the day. Females give birth to only one offspring each year and rarely twins. Infants are large and precocial at birth.

   ADW: Aotus trivirgatus: INFORMATION

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   What does Aotus trivirgatus look like?

   • Aotus trivirgatus is found to prefer large canopied fruit trees. (Baer et al. 1994) Both males and females of Aotus trivirgatus are similar in size with a body length of 24 to 47 cm. Tail length ranges from 22 to 42 cm. Coats range from grizzled brown, gray or reddish backs and off white to orange undersides.

   ADW: Aotus trivirgatus: INFORMATION

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   How do Aotus trivirgatus find a mate?

   • Aotus seem to rely most heavily on calls to find mates. Since calls are not common among Aotus trivirgatus, a hoot usually indicates a lone male or female looking for a mate. Copulations generally take place at night, though they have been observed in the day. Females give birth to only one offspring each year and rarely twins.

   ADW: Aotus trivirgatus: INFORMATION

   animaldiversity.org/accounts/Aotus_trivirgatus/

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   Are owl monkeys unfaithful?

   • "Owl monkeys are one of the few mammals where we have absolutely no evidence of unfaithfulness; there’s not a single genetic data point that suggests that males and females in pair relationships – who sleep together, feed together, move together – are not exclusively mating with each other," continued Fernandez-Duque.

   Meet The Owl Monkey: The World’s Only Nocturnal Monkey Species

   www.iflscience.com/meet-the-owl-monkey-the-worlds-only-nocturnal-monkey-species-73369

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   Are owl monkeys monogamous?

   • “Male and female owl monkeys establish pairs, forming very emotionally strong and enduring relationships. Our research indicates that they are also genetically monogamous, they only reproduce with each other,” said biological anthropologist Professor Eduardo Fernandez-Duque in an interview for Yale News.

   Meet The Owl Monkey: The World’s Only Nocturnal Monkey Species

   www.iflscience.com/meet-the-owl-monkey-the-worlds-only-nocturnal-monkey-species-73369

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10. animaldiversity.org › accounts › AotidaeADW: Aotidae: INFORMATION

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    Night monkeys have very large eyes and use their sense of vision extensively. They have excellent vision in low light and can see in color. They communicate with vocalizations and with chemical cues. A captive night monkey was reported to use as many as 50 different kinds of vocalizations.