Michael Hutchinson / Male Marsh fritillary butterfly (Euphydryas aurinia) displaying to a female on a Buttercup (Ranunculus) flower, Devon, England, UK, June.

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

Glenn Bartley/ BIA / Streamertail (Trochilus polytmus) male feeding on flower nectar, Jamaica

Philippe Clement / Two Atlantic puffins (Fratercula arctica) in breeding plumage on cliff top, Sumburgh Head, Shetland Islands, Scotland, UK, June.

Ross Hoddinott / Male banded demoiselle (Calopteryx splendens), resting on flower head, Lower Tamar Lakes, Cornwall, UK. June.

Graeme Guy/ BIA / Green-breasted Mango (Anthracothorax prevostii) male feeding on flower nectar, Costa Rica

Ross Hoddinott / Early-purple orchids (Orchis mascula), Broxwater, Cornwall, UK. April 2017.

Nick Upton / Slow motion cllip of a Marbled white butterfly (Melanargia galathea) nectaring on a Creeping thistle (Cirsium arvense) flower, with another trying to court with it, Wiltshire, England, UK, July.

Stephen Dalton / Horse fly (Tabanus sp) male taking off from poppy seed-head (Papaver rhoeas) Sussex, UK

Biraj Sarkar/ BIA / Fire-tailed Sunbird (Aethopyga ignicauda) male feeding on flower nectar, Darjeeling, India

Donald M. Jones / Pyrrhuloxia (Cardinalis sinuatus) male feeding on Ocotillo (Fouquieria splendens) flowers, southern Arizona

Melvin Grey / Purple-throated woodstar hummingbird (Calliphlox mitchellii) hummingbird male flying to garden flower, Mindo Loma, Ecuador