Stephen Dalton / Muscid fly (Muscidae) on glass, viewed from under the glass showing feet, UK, controlled conditions

Anup Shah / Celebes / Black crested macaque (Macaca nigra) females carrying their babies aged less than 1 month under their bellies, Tangkoko National Park, Sulawesi, Indonesia.

Juergen Freund / Underside of Grey reef shark (Carcharhinus amblyrhynchos) and other fish at North Horn, Queensland, Australia

Paul D Stewart / Falklands Wolf (Dusicyon australis). 1778 'The Wolf Fox of Faulklands Islands', a copperplate engraving from Commodore Byron's 'An account of a Voyage Round the World'. The Falkland Islands Wolf, Dusi...