The cute creatures are chatty, family oriented—and facing a shrinking habitat in the remote forests of Ecuador ...

Unlike other monkeys, marmosets give birth to two or more young in a litter ... techniques are undoubtedly those in which there is likely to be a food reward. Toys alone tend to be ignored once the ...

The common marmoset may be small enough to fit in the palm of a hand, but the diminutive stature of these monkeys belies their enormous significance in unraveling the intricate mysteries of human ...