Tony Heald / Young cape fox (Vulpes chama) sniffs at giant south african millipede. Kalahari Gemsbok NP, South Africa

Jane Burton / Domestic Cat {Felis catus} Tortoiseshell kitten 'Mull' approaches child with tail up, sniffs hand

Staffan Widstrand / European grey wolf sniffing researcher Barbara Furpass-Prombergen Romania.

Karl Ammann / African elephant sniffs female prior to mating {Loxodonta africana} Kenya

Mitsuaki Iwago / Spotted Hyena (Crocuta crocuta) mother nursing pup while another Hyena sniffs her for identification, Serengeti

BARBARA TODD / Komodo dragon sniffs ground with tongue {Varanus komodoensis} Komodo Is, Indonesia

Mike Wilkes / Young African elephant sniffs air. Serengeti, Tanzania

Elio Della Ferrera / Gelada baboon male sniffs female genitals {Theropithecus gelada} Simien NP Ethiopia