An adult yellow-crowned brush-tailed rat (Isothrix bistriata), on Iricahua Cano, Amazon Basin, Peru, South America

Parent on nest with egg. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Feeding of chick. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Parent with chick. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Collecting nesting material. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Adult calling. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Adult calling. Gentoo penguin (Pygoscelis papua) on the Falkland Islands. South America, January

Australia, New South Wales, Jenolan Caves, Brush-tailed rock-wallaby (Petrogale penicillata) sitting on rock among branches

Australia, New South Wales, Jenolan Caves, Brush-tailed rock-wallaby (Petrogale penicillata) sitting on rock among branches

Researchers applying a mascara brush to the hairs of a Sowell's short-tailed bat (Carollia sowelli) to test methods to capture pollen that bats may carry as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Researchers applying a mascara brush to the hairs of a Sowell's short-tailed bat (Carollia sowelli) to test methods to capture pollen that bats may carry as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Researchers picking up pollen with a brush from the beak of a Rufous-tailed hummingbird as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui , Costa Rica