Phil Savoie / Mining bee (Andrena sp.), harvesting pollen from anthers of Cherry tree (Prunus sp.) Ripon Wisconsin USA, May.

Heather Angel / Honey bee (Apis mellifera) forages on pollen in Apple (Malus domestica) flower, collecting pollen in pollen basket. In garden, Surrey, England, UK. May.

Nigel Cattlin / Immature caterpillar of a codling moth (Cydia pomonell) eating its way through a gallery in a ripening apple fruit, Berkshire, July

Marie Read / Eastern bluebird (Sialia sialis) male fluttering wings while perched on cherry (Prunus sp.) branch in spring, New York, USA, April.

Marie Read / Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May.

Hermann Brehm / Blackcap (Sylviya atricapilla) male perched in blossom, Hungary, April.

Steve Downer / Timelapse of Blackthorn (Prunus spinosa) flowers opening, UK, April.

Alastair MacEwen / Time-lapse of Cherry (Prunus) blossom emerging, Somerset, England, UK, April.

Staffan Widstrand / Wooden house in Musteika Village, Lithuania, May 2015.

Andy Trowbridge / Male Goldfinch (Carduelis carduelis) perched on flowering European bird cherry (Prunus padus). Southern Norway. May.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male feeding from Chinese wild peach flowers (Prunus davidiana) Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China. May.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male hanging upside down and feeding from Chinese wild peach (Prunus davidiana) male blossom, Kawakarpo Mountain, Meri Snow Mountain National Park, Yun...