Nick Garbutt / Black lemur (Eulemur macaco) female, looking down from tree, Nosy Komba, Madagascar. Endangered.

Pete Oxford / Local women feeding black lemurs, faces painted with sandlewood paste, Nosy Komba Island, Madagascar

Nick Garbutt / Black lemur male, Nosy Komba, Madagascar

Konrad Wothe / Black Lemur (Lemur macaco) female climbing, Nosy Komba, Madagascar

Konrad Wothe / Black Lemur (Lemur macaco) female, vulnerable species, Nosy Komba, Madagascar

Suzi Eszterhas / Sea Otter (Enhydra lutris) mother with three day old newborn pup, Monterey Bay, California

Heike Odermatt / Southern Elephant Seal (Mirounga leonina) pups, Sea Lion Island, Falkland Islands

Fiona Rogers / Southern Plains Gray Langur (Semnopithecus dussumieri) newborn with mother, Jodhpur, Rajasthan, India

Sean Crane / Mountain Gorilla (Gorilla gorilla beringei) mother and young, Bwindi Impenetrable National Park, Uganda

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) mother and two month old baby, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Proboscis Monkey (Nasalis larvatus) mother holding baby, Sabah, Borneo, Malaysia

Aflo / Japanese macaque (Macaca fuscata) mother cuddling baby, Yamanouchi, Shimotakai District, Nagano Prefecture, Japan. June.

Fiona Rogers / Japanese Macaque (Macaca fuscata) female holding her baby, Jigokudani Monkey Park, Japan

Fiona Rogers / Japanese Macaque (Macaca fuscata) female cuddling her baby, Jigokudani Monkey Park, Japan

Fiona Rogers / Sumatran Orangutan (Pongo abelii) twenty-four year old female, named Ratna, playing with her female baby, named Global, Gunung Leuser National Park, Sumatra, Indonesia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother mother cuddling her seven-month-old joey, Queensland, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother cuddling her seven-month-old joey, Queensland, Australia