When Ruppert and her colleagues noticed that in 10 years, more than half of the baby pig-tailed macaques born in the group died before they turned a year old, they knew something was off.

The stump-tailed macaque, (Macaca arctoides), is one of the largest of the macaque family, adult males attaining weights approaching 25 kg. Our colony consists of fifty macaques, all laboratory bred, ...

Primate species in research include rhesus macaques, long-tailed (a.k.a. crab-eating or cynomolgus) macaques, stump-tailed macaques, pig-tailed macaques, squirrel monkeys, owl monkeys, African green ...