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

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

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri) colony, with Snow petrel (Pagodroma nivea) flying past and dark sky. Atka Bay. Antarctica

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarctica) on a blue iceberg, with Antarctic Prion (Pachyptila desolata) flying over. Antarctica

Scott Leslie / American Goldfinch (Carduelis tristis) male in cherry tree blossoms, Nova Scotia, Canada

Scott Leslie / American Goldfinch (Carduelis tristis) male in cherry tree blossoms, Nova Scotia, Canada

Simon Colmer / Bird cherry (Prunus padus) buds in winter, UK

Peter Lewis / Common Cuckoo (Cuculus canorus) perched on Cherry tree blossom Surrey, England, UK. April.

Nigel Cattlin / Plantation of young trees including Wild cherry (Prunus avium) and Ash (Fraxinus excelsior) with tree guards, trees to be used in woodland. Berkshire, England, UK. April.

Nigel Cattlin / Bird cherry-oat aphid (Rhopalosiphum padi) infestation on Wheat (Triticum aestivum) leaf with Barley yellow dwarf virus (BYDV) symptoms present.

Konrad Wothe / Bird-cherry ermine moths (Yponomeuta evonymella) Germany. June.

Duncan Usher / Blue Tit (Cyanistes caeruleus) on flowering Cornelian Cherry (Cornus mas), Hesse, Germany