Pictured here, a father titi monkey carries his one-week-old infant. Titi monkeys (Callicebinae spp.) show biparental care, in which the father does the majority of infant care and carrying. The mother nurses, but dad is on duty 24/7!

[Photo by Alexander Baxter, Caption by Allison Lau]

Mendoza, S. P., & Mason, W. A. (1986). Parental division of labour and differentiation of attachments in a monogamous primate (Callicebus moloch). Animal Behaviour, 34(5), 1336-1347.

[Edited by Karli Chudeau]