Nick Upton / Adult Herring gull (Larus argentatus) walking among sunbathers on beach, St.Ives, Cornwall, UK, June. Editorial use only.

Aflo / Cat stretching forward whilst sunbathing, Hofu, Yamaguchi, Japan.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) sunbathing on rock in early morning, granite mountain in background. Anja Community Reserve, Madagascar. 2018.

David Fleetham / Kawakiu Nui Beach on West End, Molokai, Hawaii. July 2017.

Mary McDonald / Steller sea lion (Eumetopias jubatus) sunning on channel buoy, Petersburg, Alaska, USA, August.

Bernard Castelein / Ring-tailed Lemur (Lemur catta), sunbathing, Anjaha Community Conservation Site, near Ambalavao, Madagascar

Nick Upton / Adult Herring gull (Larus argentatus) walking among sunbathers on beach, St.Ives, Cornwall, UK, June. Editorial use only.

Nick Upton / Adult Herring gull (Larus argentatus) walking among sunbathers on beach, St.Ives, Cornwall, UK, June. Editorial use only.

Nick Upton / Adult Herring gull (Larus argentatus) walking among sunbathers on beach, St.Ives, Cornwall, UK, June. Editorial use only.

Kim Taylor / Blackbird (Turdus merula) male sun bathing. Surrey, England, April.

Enrique Lopez-Tapia / Ring-tailed lemur (Lemur catta) sunning. Berenty Reserve, Madagascar. Endangered species.

Enrique Lopez-Tapia / Ring-tailed lemur (Lemur catta) sunning at sunset, Berenty Reserve, Madagascar. Endangered species.