Thomas Marent / Tigerwing butterfly (Mechanitis sp.), two chrysalis, Ithomiini, Santa Maria, Boyacá, Colombia

Tui De Roy / Blue-footed Booby (Sula nebouxii) incubating eggs, Santa Cruz Island, Galapagos Islands, Ecuador

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

John Cancalosi / American bullfrog (Lithobates catesbeianus) swimming near Water lilies (Nymphaea sp) Washington DC, USA. July.

Pascal Pittorino / Horned pansy (Viola cornuta) in botanic garden, Var, France, March.

Michael Hutchinson / Dandelion (Taraxacum) seed head in grass meadow, Ashton Court, North Somerset, UK, May.

Enrique Lopez-Tapia / Pitcher plant (Nepenthes vieillaedii) Blue River Provincial Park / Parc Provincial de la Riviere Bleue, New Caledonia.

Jabruson / Non biodegradable rubbish in abandoned forest camp. Lokoue, Odzala-Kokoua National Park, Democratic Republic of Congo, May 2004.

Ernie Janes / Swallow (Hirundo rustica) adult perched on swallow weather vane, England, UK, June.

Kirkendall-Spring / View over the Campbell Lakes with stormy clouds at dusk, viewed from Walker Valley Overlook in Hart Mountain National Antelope Refuge, Oregon, USA, May 2013.

Alex Mustard / Plumose anemones (Metridium senile) and common starfish (Asterias rubens) beneath the sun in a Norwegian Fjord. Gulen, Bergen, Norway. North East Atlantic Ocean.