San Martin titi monkey
This tiny brownish-gray monkey is critically endangered. That’s just one step away from being extinct in the wild, according to the IUCN’s Red List of Threatened Species.
Humans are taking over these creatures’ territory to build roads, farms, and housing, and the monkey is sold on the black market as meat.
It lives only in north-central Peru. The Rainforest Trust calls it “Peru’s most imperiled primate” and is raising money to create a conservation area.