An tiny eastern pygmy marmoset sits nervously on a branch of a tree in front of the camera exploring its surroundings

pygmy marmoset marmoset new world monkey small mammal primate monkey callithrix pygmaea iucn primates monkeys wildlife wildlife trade biodiversity mammal small habitat captive conservation tiny habitat loss zoo rainforests little rainforest fluffy smallest species pet trade ecology captivity environment nature south america omnivore ecological hairy forest lovable cute brazill amazon adorable sweet extinction diverse evolution cuddle captivating climate change