Kevin Schafer / Bumblebee (Bombus sp) on flower, Juneau, Alaska

Richard Du Toit / Greater Double-collared Sunbird (Nectarinia afra) male on Pincushion (Leucospermum sp) flower, Western Cape, South Africa

Martin Willis / Red-collared Lorikeet (Trichoglossus rubritorquis) feeding on flower nectar, Kimberley, Western Australia, Australia

Donald M. Jones / Rufous Hummingbird (Selasphorus rufus) female feeding on flower nectar, Montana

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

Chien Lee / Pallas' Long-tongued Bat (Glossophaga soricina) approaching Tea Mangrove (Pelliciera rhizophorae) flower at night, Utria National Park, Colombia

Chien Lee / Pallas' Long-tongued Bat (Glossophaga soricina) approaching Tea Mangrove (Pelliciera rhizophorae) flower at night, Utria National Park, Colombia

Konrad Wothe / Booted Racket-tail (Ocreatus underwoodii) feeding on flower nectar, Ecuador

Chien Lee / Lesser Long-tongued Fruit Bat (Macroglossus minimus) approaching Durian (Durio zibethinus) flower nectar, Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) feeding on cactus flower nectar, southern Arizona

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) feeding on cactus flower nectar, southern Arizona. Sequence 2 of 2

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

Agustin Esmoris / Plovercrest (Stephanoxis lalandi) hummingbird feeding on flower nectar, Argentina

Agustin Esmoris / White-throated Hummingbird (Leucochloris albicollis) feeding on flower nectar, Argentina

Agustin Esmoris / White-throated Hummingbird (Leucochloris albicollis) feeding on flower nectar, Argentina

Agustin Esmoris / Gilded Hummingbird (Hylocharis chrysura) feeding on flower nectar, Argentina

Agustin Esmoris / Bananaquit (Coereba flaveola) on flower, Argentina

Agustin Esmoris / Honey Bee (Apis mellifera) feeding on Lavender (Lavandula sp) flower nectar, Argentina

Agustin Esmoris / Black-throated Mango (Anthracothorax nigricollis) hummingbird feeding on flower nectar, Argentina

Agustin Esmoris / Gulf Fritillary (Agraulis vanillae) butterfly on Zinnia (Zinnia sp) flower, Bahia Blanca, Argentina

Agustin Esmoris / Gulf Fritillary (Agraulis vanillae) butterfly on Zinnia (Zinnia sp) flower, Bahia Blanca, Argentina

Thomas Marent / Velvet-purple Coronet (Boissonneaua jardini) hummingbird feeding on flower nectar, Las Tangaras Bird Reserve, Colombia

Thomas Marent / Cotton-top Tamarin (Saguinus oedipus) with red pollen after feeding on flower nectar, Tayrona National Natural Park, Colombia

Glenn Bartley/ BIA / Golden-breasted Puffleg (Eriocnemis mosquera) feeding on flower nectar, Colombia

Peter Schwarz/ BIA / Yellow Crab Spider (Thomisus onustus) camouflaged on flower, Dalmatia, Croatia

Debapratim Saha/ BIA / Streaked Spiderhunter (Arachnothera magna) feeding on Chinese Hat Plant (Holmskioldia sanguinea) flower nectar, West Bengal, India

Mark Raycroft / Black Labrador Retriever (Canis familiaris) puppy sniffing flower

Michael Durham / Honey Bee (Apis mellifera) with pollen baskets, Oregon

Greg Oakley/ BIA / Red Wattlebird (Anthochaera carunculata) feeding on flower nectar, Victoria, Australia

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

Biraj Sarkar/ BIA / Streaked Spiderhunter (Arachnothera magna) feeding on flower nectar, Darjeeling, India

Donald M. Jones / Gila Woodpecker (Melanerpes uropygialis) feeding on Saguaro (Carnegiea gigantea) cactus flower, southern Arizona

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) feeding on Saguaro (Carnegiea gigantea) cactus flower, southern Arizona

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

Christian Ziegler / Bucket Orchid (Coryanthes panamensis) flower attracting bee for pollination through scent, Panama

Robert Thompson / Four spotted chaser (Libellula quardrimaculata) Montiaghs Moss NNR, Aghalee, County Antrim, Northern Ireland, June.

Juan Carlos Munoz / Hut in Lavender (Lavandula angustifolia) fields, Valensole Plateau, Alpes Haute Provence, France, June 2015.

Dong Lei / Poppy (Meconopsis punicea) in habitat, Serxu, Shiqu county, Sichuan Province, Qinghai-Tibet Plateau, China. August.

Dong Lei / Poppy (Meconopsis racemosa) flower in habitat. Serxu, Shiqu county, Sichuan Province, Qinghai-Tibet Plateau, China. August.

Gabriel Rojo / Close up of Passionflower (Passiflora caerulea) La Pampa, Argentina.

Sean Crane / Hoary Marmot (Marmota caligata) feeding on Indian Paintbrush (Castilleja coccinea) flowers, Mount Rainier National Park, Washington

Ole Jorgen Liodden / White anemone (Anemone nemorosa) against pink background, Ringerike, Norway, May.

Ole Jorgen Liodden / Heartsease / Wild pansy (Viola tricolor) flower, Norway, May.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Tim Zurowski / Rufous Hummingbird (Selasphorus rufus) female feeding on flower nectar, British Columbia, Canada

Jack Jeffrey / Anianiau (Viridonia parva) male perching on flowers, Hawaii

Jack Jeffrey / Apapane (Himatione sanguinea) on flowering plant, Hawaii

Jack Jeffrey / Apapane (Himatione sanguinea) feeding on flower nectar, Hawaii

Jack Jeffrey / Common Amakihi (Viridonia virens) male perched on flowers, Hawaii

Ann & Steve Toon / Cornfield annual summer wildflowers growing on one of the plant charity Landlife's National Wildflower Farms, St Helens, Merseyside, UK, June.

Silvia Reiche / Cabbage White (Pieris rapae) butterfly on flower, Netherlands

Graeme Guy / Green Hermit (Phaethornis guy) hummingbird male feeding on flower nectar, Costa Rica

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

Graeme Guy / Violet-crowned Woodnymph (Thalurania colombica) hummingbird male feeding on flower nectar, Costa Rica

Debapratim Saha / Streaked Spiderhunter (Arachnothera magna) feeding on flower nectar, Darjeeling, India

Willem Kolvoort / White waterlily (Nymphaea alba) in Naardermeer bog lake, Holland. May.

D. Parer & E. Parer-Cook / Rainbow Lorikeet (Trichoglossus haematodus) feeding on Queensland Umbrella Tree (Schefflera sp) flowers, Victoria, Australia

Robert Thompson / Owlfly sulphur (Libelloides coccajus) on flower, near Gavarnie, Pyrenees National Park, France, June.

Dong Lei / Yellow poppywort (Meconopsis integrifolia) flowering, Qinghai-Tibet Plateau, Shiqu County, Sichuan Province, China, August.

Alex Hyde / Sun Beetle (Pachnoda marginata peregrina) photographed on a white background. Captive, originating from west and central Africa

Alex Hyde / Red Admiral butterfly (Vanessa atalanta) feeding on rotten apple. Derbyshire, August.

Alex Hyde / Alpine meadow in flower including Scabious flowers. Austrian Alps at 1700 metres altitude, North Tyrol, Austria, June

Alex Hyde / Malaysian Orchid Mantis (Hymenopus coronatus) white colour morph camouflaged on an orchid. Captive. Originating from Malaysia.

Angelo Gandolfi / Pampas deer (Ozotoceros bezoarticus) buck in velvet standing by flowering tree, Pantanal, Brazil

Ernie Janes / Small Tortoisehell Butterfly (Aglais urticae) on cone flowers (Echinacea) in garden with greenhouse in background England, UK, August.

Ernie Janes / Field Poppies Pavaver rhoea and Sugar beet crop in Norfolk Field UK July

Ernie Janes / Montbretia (Crocosmias) in flower in Norfolk garden, England, UK, July.

David Pattyn / Flowering Thrift (Armeria maritima) photographed on Great Saltee with a view of the island behind. Great Saltee, Saltee Islands, Co. Wexford, Republic of Ireland, June.

David Pike / Harvest mouse (Micromys minutus) on stalk, West Country Wildlife Photography Centre, captive, June.

Jussi Murtosaari / Scarce Copper (Lycaena virgaureae) male in meadow on ox-eye daisy, Joutsa (formerly Leivonmaki), Finland, July.

Jussi Murtosaari / Geranium Argus butterfly (Plebejus eumedon) feeding on Wood Cranesbill (Geranium sylvaticum) northern Finland, June.

Nick Upton / Pollen and nectar flower mix strip with Mustard (Brassicaceae), Common sainfoin (Onobrychis viciifolia) and Red clover (Trifolium pratense) bordering a Barley crop (Hordeum vulgare), Marlborough Downs...

Gary K. Smith / Marsh harrier (Circus aeruginosus) adult female circling over Oilseed rape crop, Norfolk, England, May. Digital composite.

Glenn Bartley / Violet-crowned Woodnymph (Thalurania colombica) female feeding on nectar, Costa Rica

Adrian Davies / Monkshood (Aconitum), Surrey, England, UK, June.

Lynn M Stone / English Springer Spaniel in Virginia Cowslip (Lamprocapnos spectabilis) Rockton, Illinois, USA

Konrad Wothe / Orchid (Arachnis flosaeris) in flower, hotel garden, Ranomafana, Madagascar, Africa. Non native species originally from Indonesia

Dr. Axel Gebauer / Oxeye daisy (Leucanthemum vulgare) abstract, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Merryn Thomas,Merryn Thomas / Globeflowers (Trollius), Lauterbrunnen Valley, Bernese Oberland, Switzerland, June 2012.

Ernie Janes / Oyster Catcher (Haematopus ostralegus) in tulip (Tulipa) field, North Norfolk, May 2013

Ernie Janes / Magnolia 'Rustica rubra' in flower in garden, UK, May

Ernie Janes / Yellow Labrador portrait in wild flowers.

Ernie Janes / Grey Partridge (Perdix perdix) in tulip field, Norfolk

Pal Hermansen / Meadow vetchling (Lathyrus pratensis) and brambles (Rubus) growing on the dashboard of the abandoned car in 'car graveyard' Bastnas, Sweden, July

Kevin Schafer / Southern Double-collared Sunbird (Cinnyris chalybeus) male on Pincushion (Leucospermum sp) protea flower, Kirstenbosch Garden, Cape Town, South Africa

Theo Bosboom / Cushion pink (Silene acaulis) in highlands, A?xarfjardarheidi, Iceland, June

Theo Bosboom,Theo Bosboom / Flowers in bloom with Poppies (Papaver rhoeas) and Anthemis in field near Huissen, the Netherlands, June 2011

Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) eating a flower, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Banana (Musa sp) flower, Democratic Republic of the Congo

Paul Harcourt Davies,Paul Harcourt Davies / Martagon lily (Lilium martagonium) flower, Terminillo, Rieti, Lazio, Italy, July

Paul Harcourt Davies,Paul Harcourt Davies / Apollo butterfly (Parnasius apollo) feeding on flower, Mount Terminillo, Rieti, Lazio, Italy, July 2011

Paul Harcourt Davies / Alpine Snowbell (Soldanella alpina) in flower, above Madoona di Campiglio, Brenta Dolomites, Italy, June 2010

Paul Harcourt Davies / Floral colour in fields on the Piano Grande from Poppies (Papaver rhoeas), Cornflowers (Centaurea), Mustard (Brassica) and Mayweed (Anthemis), Umbria, Italy, June