Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) in tree, Jozany Forest, Zanzibar, Tanzania. Highly endangered. Did you know? Zanzibar red colobuses are called 'Poison monkeys' by the local people on the is...

Mark Hamblin / 2020VISION / Common frog (Rana temporaria) in garden pond, Warwickshire, England, UK, March. Did you know? Frogs return to their natal pond using their sense of smell.

Mark Hamblin / 2020VISION / Wood anemones (Anemone nemorosa) growing in profusion on woodland floor, Scotland, UK, May 2010. Photographer quote: 'Driving home for the dentist I saw the most amazing display of wood anemones. It w...

Tony Heald / African elephant [Loxodonta africana] female herd approaching waterhole with trunks raised to smell danger, Etosha National Park, Namibia, August

Andrew Parkinson / Bengal tiger (Panthera tigris tigris) an adult female sniffing for scent marks. Bandhavgarh National Park, Madhya Pradesh, India.

John Downer Productions / Spotted skunk does handstand as initial warning then sprays out stench if warning not heeded (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Nigel Cattlin / Wood anemone (Anemone nemorosa) and Lesser celandine (Ficaria verna) flowering on woodland floor. Hampshire, England, UK. March.

Heather Angel / Flesh fly (Sarcophaga sp) nectaring on Bi-coloured pineapple lily (Eucocmis bicolor). Fly attracted by flower's rotting carion smell. Pollen is transferred via thorax and legs of fly. Cultivated i...

SCOTLAND: The Big Picture / Red Deer (Cervus elaphus) covering itself in mud from a muddy puddle after urinating in it in order to smell strong and warn off rivals, Scotland, UK, October.

Ross Hoddinott / Wood anemone flower (Anemone nemorosa), RHS Rosemoor, near Great Torrington, Devon, UK. April.

Ross Hoddinott / Wood anemone flower (Anemone nemorosa), RHS Rosemoor, near Great Torrington, Devon, UK. April.

Sven Zacek / Wood anemone (Anemone nemorosa) flowers. Haanja Nature Park, Vorumaa, Southern Estonia. May.