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- Night monkeys are arboreal and live in family groups consisting of an adult pair and two or three offspring. During the day, the family sleeps in tree hollows or tangled vines. At night they forage for food throughout the forest levels, sometimes descending to the ground. They are especially active on moonlit nights, when they can see better.
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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. They have a varied repertoire of vocalisations and live in small family groups of a mated pair and their immature offspring.
Night monkeys (Aotus spp.) typically live in small family groups consisting of a monogamous pair and their offspring. These groups are highly cohesive, with strong bonds between members. Both parents are involved in raising the young, exhibiting cooperative breeding behavior.
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.
Geographic Distribution and Habitat. Northern night monkeys—also known as northern owl monkeys, three-striped night monkeys, or douroucoulis—are found north of the Amazon River, primarily between southern Venezuela and north-central Brazil.
- Activity Patterns
- Diet
- Home Range and CORE Area
- Distance Traveled Per Night
From the systematic monitoring of four groups of night monkeys over a period of approximately 1 yr, in two different tropical ecosystems, we found that these nocturnal primates spend a large proportion of the night resting. Night monkeys in lowland and highland forests had very similar use of time. These results suggest that night monkeys in tropic...
We found that night monkeys rely heavily on ripe fruits, and all study groups spent >60% of the feeding time eating fruits. Similar results have been reported for other groups of Aotus lemurinus (Castaño et al. 2010; Guzmán et al. 2016) and for other species of night monkeys such as A. azarae (Arditi 1992; Fernandez-Duque and van der Heide 2013) an...
The night monkeys have high behavioral plasticity and can be found in many types of forests, from highlands to lowlands, and from relatively undisturbed to heavily disturbed forest (Castaño et al. 2010; Defler 2010; Montilla et al. 2018). Home ranges range from 17.5 ha for Aotus brumbacki in Tinigua National Park in Colombia (estimated using minimu...
The distances traveled per night by the four study groups are partially consistent with the results of other studies of night monkeys. Nightly distances reported so far range from 252 m in Aotus nigriceps to 854 m in A. lemurinus (Castaño et al. 2010; Fernandez-Duque et al. 2008; Solano 1995). The distances we recorded for A. lemurinus groups CO1 (...
- Sebastián O. Montilla, Alex Mauricio Mopán-Chilito, Laura Natalia Sierra Murcia, Jonathan David Mahe...
- 2021
Night monkeys are primarily active at night, although daytime activity has also been reported. Aotids are the only nocturnal monkeys in the New World. Night monkeys use day nest sites in tree hollows, cavities in woody vines, and in accumulations of leaves and sticks.
Habitat: Three-striped night monkeys inhabit different types of forests, including evergreen forests, wet and dry forests, and forests along rivers. They prefer forests with thick, tangled vines and thickets for cover during sleep or rest. They also thrive near human developments.
