Anup Shah / Olive Baboon (Papio anubis) male with three month old young, Gombe National Park, Tanzania

Willi Rolfes/ BIA / Alpine Marmot (Marmota marmota) parent with young feeding, Hohe Tauern National Park, Austria

Willi Rolfes/ BIA / Alpine Marmot (Marmota marmota) parent feeding with begging young, Hohe Tauern National Park, Austria

Willi Rolfes/ BIA / Alpine Marmot (Marmota marmota) parent with young feeding, Hohe Tauern National Park, Austria

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with young drinking, Anja Park, Madagascar

Richard Du Toit / Northern Giraffe (Giraffa camelopardalis) mother and calf, Itala Game Reserve, KwaZulu-Natal, South Africa

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

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

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

Pete Oxford / Brown Capuchin (Cebus apella) pair using rock and anvil to crack open Piassava Palm (Attalea funifera) nuts, Cerrado habitat, Piaui State, Brazil

Chase Dekker / Vervet Monkey (Chlorocebus pygerythrus) mother and young, Amboseli National Park, Kenya

Chase Dekker / Vervet Monkey (Chlorocebus pygerythrus) mother and young, Amboseli National Park, Kenya