The Bolivian gray titi is a small monkey found in tropical forests of central Bolivia.  Both sexes have thick, long fur, making them look "fluffy" and bigger than they actually are.  The fur varies from buffy to gray to orangish above and orangish below, with the tail buffy to blackish.  This titi has conspicuous white tufts of fur at the ears, and is sometimes called the "white-eared titi".

Longevity

In zoos, a typical lifespan for a Bolivian gray titi is about fifteen years.  a few individuals live into their late twenties, but as in all other animals (including us!), most individuals don't reach maximum ages.  Typical lifespan in the wild is not known.

Behavior

In zoos, the Bolivian gray titi lives in small family groups, usually including a breeding pair and up to several offspring.  This species has not been studied well in the wild, but other titis that have been studied live as monogamous pairs with offspring, so it seems likely that wild Bolivian gray titis do as well.

Titis are diurnal (active during the day) and arboreal.  Titis do not have prehensile tails like some other South American monkeys do.  However, when any two or more members of a titi family group sit next to each other, they typically twine their tails together like a braid.  This behavior, unique to titis among all monkeys (at least in frequency), probably serves to reinforce the pair bond and other social relationships within a group.  Titis engage in this behavior both awake and asleep.

Reproduction

Gestation for the Bolivian gray titi monkey is about 132 days, a little over 4 months.  A single baby is usually born; twins are extremely rare.  A titi father helps with infant care, carrying the baby on his back much of the time beginning the first few days after the birth.  Older offspring in the group may also help carry their new brother or sister.