A warning sign stating that the road can be closed seasonally, Coconino National Forest, Arizona, United States of America

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

The boundary fence on the east side of Petrified Forest National Park, Arizona, United States of America

Boundary gate and cattle-proof fence between Coconino National Forest and Wet Beaver Creek Wilderness, Arizona, United States of America

View of the Alhambra at sunrise, UNESCO World Heritage Site, from Albaicin area, Granada, Andalucia, Spain, Europe

Young woman faces blizzard while hiking in snowy day at Pe?alara, highest mountain peak in the mountain range of Guadarrama, Spain

USA, United States of America, Arizona: Petrified Forest National Park. Park with bizarre erosion landscape, Painted Desert area and petrified trees.. Navajo Indian Reservation.

USA, United States of America, Arizona: Petrified Forest National Park. Park with bizarre erosion landscape, Painted Desert area and petrified trees.. Navajo Indian Reservation.

Aerial view, wind turbines on Rosskopf mountain, Freiburg im Breisgau, Baden-Wuerttemberg, Germany, Europe

Wooden fences, protection from snow avalanches and snow drifts, Austria, Europe

The Wildsee with its small islands in the Wildseemoor on a sunny day, Kaltenbronn nature reserve and forest reserve in the Black Forest, Baden-Wuerttemberg, Germany, Europe

Sowell's short-tailed bat (Carollia sowelli) caught as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Researchers applying tape to the hairs of a bat to test methods to capture the pollen it carries 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

Sowell's short-tailed bat (Carollia sowelli) caught as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Fringe-lipped Bat (Trachops cirrhosus) in the hand of a scientist as part of a pollination study, tropical forest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Snowshoeing at La Dole, Jura sur Leman ski resort, Canton Vaud, Switzerland

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

Researcher unhooking a bat caught in a net as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Iberian Lynx (Lynx pardinus) at rest, Finca de Penalajo, Private property supporting the protection of the lynx, Castilla, Spain

Iberian Lynx (Lynx pardinus) at rest, Finca de Penalajo, Private property supporting the protection of the lynx, Castilla, Spain

Iberian Lynx (Lynx pardinus) walking, Finca de Penalajo, Private property supporting the protection of the lynx, Castilla, Spain