Anup Shah / Southern plains grey langur / Hanuman langurs (Semnopithecus dussumieri) walking along a ledge . Jodhpur, Rajasthan, India. March.

Anup Shah / Southern plains grey langur / Hanuman langur (Semnopithecus dussumieri) group resting on rocky ledge. Jodhpur, Rajasthan, India. March.

Dave Watts / Hermit ibis (Geronticus eremita) colony, near Tamri, Morocco. Critically endangered.

Marie Read / Horned puffins (Fratercula corniculata), one landing with outspread wings, to join its mate on cliff ledge, St. Paul Island, Pribilofs, Alaska, USA, July.

Ross Hoddinott / Kimmeridge Bay ledges at sunset, Dorset, UK. September 2014.

Markus Varesvuo / Small flock of Puffins (Fratercula arctica) perched on clastal ledge, one landing amongst the group, Norway, Scandinavia, April.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) adult male at sunset. Endemic to the Apennine mountains. Abruzzo, Italy, November.

Ben Cranke,Ben Cranke / Snow Leopard (Uncia uncia) walking down snow covered slope, Hemis National Park, Ladakh, India

Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) females gather at one end of the hot springs, Jigokudani, Japan, February

Juan Carlos Munoz / Gelada baboon (Theropithecus gelada) troop, Simien Mountains, Ethiopia, Africa

Bertie Gregory / 2020VISION / Juvenile male Peregrine falcon (Falco peregrinus)perched on a window ledge, with graffitied window behind, Bristol, England, UK, June.

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) school, under a coral ledge, Snapper Hole, East End, Grand Cayman, Cayman Islands, Caribbean Sea.