Neil Aldridge / Meerkat (Suricata suricatta) standing and keeping watch while another excavates a burrow in soft sand before disappearing underground for the night. Makgadikgadi Pans, Botswana, April.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years approaching a river while sub-adult female 'Mosoko' aged 8 years and juvenile male 'Mobangi' aged 5 y...

Terry Whittaker / 2020VISION / Grey heron (Ardea cinerea) amongst visitors in Regent's Park, London, UK, April 2011. Photographer quote: 'It was fascinating to watch public reaction to the large numbers of herons in London's parks...

David Welling / Utah Prairie Dog (Cynomys parvidens) standing on watch outside their burrow. Bryce Canyon National Park, Utah, USA, August.

Fred Bavendam / Goby (Amblyeleotris sp) keeping watch while a Snapping Shrimp (Alpheus randalli) excavates their shared burrow, Bali, Indonesia

Konrad Wothe / Gray Whale (Eschrichtius robustus) breaching while tourists watch, Mexico

DOC WHITE / Boy and girl watch Beluga whale {Delphinapterus leucas} at Mystic Aquarium, Connecticut, USA. Model released White whales

Angela Scott / 'Zawadi' leopard on watch up on rocks {Panthera pardus} Masai Mara NR, Kenya, East Africa. BIG CAT DIARY

Jeff Rotman / Divers watch Caribbean reef shark {Carcharhinus perezi} Bahamas, Caribbean. Model released.

Doug Gimesy / Koala (Phascolarctos cinereus) that has been captured for a health check following bush fires in the area, in crate prior to transport to the Bairnsdale wildlife triage centre - which had been set up...

Franco Banfi / Person in river flowing through beach. Camp with tents in background, gathering to watch yearly congregation of Bowhead whales (Balaena mysticetus). Primorsky Krai, Russia. August 2019.

Franco Banfi / Beach and river estuary, boreal forest in background, aerial view. Camp on beach, gathering to watch Bowhead whale (Balaena mysticetus) congregation. Vrangel Bay, Primorsky Krai, Russia. August 2019.