Bernard Castelein / Green-veined white butterfly (Pieris napi) resting on Purple loosestrife (Lythrum salicaria), Brasschaat, Belgium. August.

Bernard Castelein / Fir trees (Abies sp.) and Heather (Calluna vulgaris) in flower at sunrise, Klein Schietveld, Brasschaat, Belgium. August.

Bernard Castelein / Raft spider (Dolomedes fimbriatus) resting on Tansy flowers (Tanacetum vulgare), Klein Schietveld, Brasschaat, Belgium. August.

Roger Powell / Bohemian waxwing (Bombycilla garrulus) male, perched in Willow (Salix sp.) tree, calling, Pokka, Finnish Lapland, Finland. May.

Roger Powell / Bohemian waxwing (Bombycilla garrulus) feeding on emerging Willow (Salix sp.) flowers against blue sky, Pokka, Finnish Lapland, Finland. May.

Mike Read / Greater stitchwort (Stellaria holostea), Bluebells (Hyacinthoides non-scripta) and Soft shield fern (Polystichum setiferum) in deciduous woodland, Naddle Forest, RSPB Haweswater Nature Reserve, Lake D...

Mike Read / Hedge woundwort (Stachys sylvatica) in flower, Hilfield Hill Nature Reserve, Dorset, England, UK. June.

Mike Read / Common spotted orchid (Dactylorhiza fuchsii) in flower, Hilfield Hill Nature Reserve, Dorset, England, UK. June.

Mike Read / Hedge woundwort (Stachys sylvatica) in flower, Hilfield Hill Nature Reserve, Dorset, England, UK. June.

Mike Read / Corn marigold (Chrysanthemum segetum) growing amongst Oats (Avena sativa) in a field near Wool, Dorset, England, UK. June.

Mike Read / Marsh gentian (Gentiana pneumonanthe) in flower in damp heathland, Hartland Moor, Isle of Purbeck, Dorset, England, UK. September.

Mike Read / Marsh gentian (Gentiana pneumonanthe) in flower in damp heathland, Hartland Moor, Isle of Purbeck, Dorset, England, UK. September.

Mike Read / Scots elm (Ulmus glabra) in flower beside the Abhainn na Coinnich river, Kingairloch Estate, Highlands, Scotland, UK. May.

Mike Read / Scots elm (Ulmus glabra) in flower beside the Abhainn na Coinnich river, Kingairloch Estate, Highlands, Scotland, UK. May.

Tim Laman / Northern double-collared sunbird (Cinnyris reichenowi) perched on Lobelia flowers, Pico Basile, Bioko Island, Equatorial Guinea.

Nick Upton / Small white butterfly (Pieris rapae) nectaring on a Greater knapweed (Centaurea scabiosa) flowerhead in chalk grassland meadow, Wiltshire, England, UK. July.

Nick Upton / Meadow brown butterfly (Maniola jurtina) nectaring on Greater knapweed (Centaurea scabiosa) flowers in a chalk grassland meadow, Wiltshire, England, UK. July.

Nick Upton / Long-horned bee (Eucera longicornis) male, nectaring from Greater bird's-foot trefoil (Lotus pedunculatus) flower on coastal grassland, The Lizard, Cornwall, England, UK. June.

Nick Upton / Long-horned bee (Eucera longicornis) male, flying towards Greater bird's-foot trefoil (Lotus pedunculatus) flowers on coastal grassland, The Lizard, Cornwall, England, UK. June.

Nick Upton / Lesser banded hoverfly (Syrphus vitripennis) nectaring on a Greater knapweed (Centaurea scabiosa) flowerhead in chalk grassland meadow, Wiltshire, England, UK. July.

Nick Upton / Gall fly / Greater fruit fly (Terellia longicauda) pair resting on the unopened flowerhead of a Woolly thistle (Cirsium eriophorum), the host plant for its larvae, in chalk grassland meadow, Wiltshire...

David Perpinan / Crab spider (Synema globosum) hiding beneath Grey-leaved cistus (Cistus albidus) petal, preparing to ambush prey, Barcelona, Spain. July.

David Perpinan / Crab spider (Thomisus onustus) on the underside of Grey-leaved cistus (Cistus albidus) petal. The Spider is moving a captured Syrphid. Barcelona, Spain. July.

David Perpinan / Crab spider (Thomisus onustus) on the underside of a Grey-leaved cistus (Cistus albidus) petal, ready to ambush its prey. The Spider is moving its fangs. Barcelona, Spain. July.

David Perpinan / Crab spiders (Thomisus onustus) (Synema globosum) on a Grey-leaved cistus (Cistus albidus) flower with Beetles. A Beetle bothers the Spider (Thomisus onustus) and then the Spider flicks it away with i...

David Perpinan / Crab spider (Thomisus onustus) on a Grey-leaved cistus (Cistus albidus) petal, ready to ambush its prey. A Beetle is feeding on the flower, infront of the Spider. Barcelona, Spain. July.

David Perpinan / Crab spider (Thomisus onustus) and Beetles on a Grey-leaved Cistus (Cistus albidus) flower. Another Crab spider (Synema globosum) appears from the underside of a petal and attempts to catch a Beetle....

David Perpinan / Crab spider (Synema globosum) on underside of a Grey-leaved Cistus (Cistus albidus) petal. It attempts to catch a Bee but fails. Barcelona, Spain. July.

David Perpinan / Crab spider (Thomisus onustus) catching a Syrphid on a Grey-leaved cistus (Cistus albidus) flower, Barcelona, Spain. July.

David Fleetham / A rare blooming Haleakala silversword plant (Argyroxiphium sandwicense macrocephalum) inside Haleakala Crater, Haleakala National Park, Hawaii. Critically endangered.

David Fleetham / Apapane bird (Himatione sanguinea) feeding on a flower blossom, Hosmer Grove, Haleakala National Park, Maui, Hawaii.

Bruce Thomson / Dagger orchid (Dendrobium pugioniforme) in flower in wet forest, Cunningham's Gap, Queensland, Australia.

Bruce Thomson / Orange blossom orchid (Sarcochilus falcatus) in flower, Cunningham's Gap, Queensland, Australia.

Bruce Thomson / Dusky honeyeater (Myzomela obscura) perched on Grevillea (Grevillea sp) flower, Wet Tropics World Heritage, Lake Eacham, Queensland, Australia.

Bruce Thomson / Dusky honeyeater (Myzomela obscura) perched on Grevillea (Grevillea sp), Wet Tropics World Heritage, Lake Eacham, Queensland, Australia.

Bruce Thomson / Waratah (Telopea speciosissima) in flower, Jarvis Bay, New South Wales, Australia.

Bruce Thomson / Australian raven (Corvus coronoides) perched on flower, Jarvis Bay, ACT, Australia.

Bruce Thomson / Acacias (Acacia sp.) flowering in the Pilliga scrub forest in spring, north of Coonabarabran, New South Wales, Australia.

Guy Edwardes / Bluebells (Hyacinthoides non-scripta) in bloom at sunrise, near Batcombe, Dorset, England, UK. May.

Guy Edwardes / Sea thrift (Armeria maritima) flowering on clifftop with view to Godrevy lighthouse at sunset, near Hayle, Cornwall, England, UK. June.

Guy Edwardes / Sea thrift (Armeria maritima) flowering on clifftop with view to Godrevy lighthouse at sunset, near Hayle, Cornwall, England, UK. June.

Guy Edwardes / Bluebells (Hyacinthoides non-scripta) and Greater stitchwort (Stellaria holostea) in flower on woodland floor in spring, Coney's Castle, Marshwood, Dorset, England, UK. May.

Guy Edwardes / Poppies (Papaver rhoeas) in bloom on cliff top at sunset, West Pentire, Cornwall, England, UK. June.

Guy Edwardes / Poppies (Papaver rhoeas) in bloom on cliff top at sunset, West Pentire, Cornwall, England, UK. June

Guy Edwardes / Poppies (Papaver rhoeas) in bloom on cliff top at sunset, West Pentire, Cornwall, England, UK. June

Guy Edwardes / Sea thrift (Armeria maritima) in flower on cliff top with Enys Dodnan sea arch and Armoured Knight rock formation at sunset, Land's End, Cornwall, England, UK. June.

Guy Edwardes / Sea thrift (Armeria maritima) in flower on cliff top with Enys Dodnan sea arch and Armoured Knight rock formation at sunset, Land's End, Cornwall, England, UK. June.

Guy Edwardes / Sunlight through Beech (Fagus sylvatica) woodland with Bluebells (Hyacinthoides non-scripta) in flower, Cranborne Chase, Dorset, England, UK. May.

Emanuele Biggi / Mediterranean tree frog (Hyla meridionalis) sitting in pond amongst vegetation, Saint Martin de Londres, France.

Guy Edwardes / Robber fly (Stenopogon sp.) feeding on hoverfly prey, near Bratsigovo, Bulgaria. May.

Guy Edwardes / Geum (Geum coccineum) flowering among Forget-me-nots (Myosotis sp.), Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Southern festoon butterfly (Zerynthia polyxena) newly emerged adult, resting on its food plant, Birthwort (Aristolochia clematitis), near Bratsigovo, Bulgaria. May.

Guy Edwardes / Southern festoon butterfly (Zerynthia polyxena), newly emerged adult, resting on Birthwort (Aristolochia clematitis), near Bratsigovo, Bulgaria. May.

Guy Edwardes / Geum (Guem coccineum) in flower, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / White false helleborine (Veratrum album) flowering in pasture, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Geum (Geum coccineum) flowering amongst Forget-me-nots (Myosotis sp.), Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Three Transparent burnet moths (Zygaena purpuralis) roosting on Viper's bugloss (Echium vulgare) flower, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Birds nest orchid (Neottia nidus-avis) in flower in beech forest, near Bratsigovo, Bulgaria. May.

Guy Edwardes / Spotted fritillary butterfly (Melitaea didyma) resting on flower, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Twin-spot fritillary butterfly (Brenthis hecate) resting on scabious (Scabiosa sp.) flower, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Apollo butterfly (Parnassius apollo) resting on Viper's-bugloss (Echium vulgare) with mountains in background, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Apollo butterfly (Parnassius apollo) resting on Viper's-bugloss (Echium vulgare), Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Apollo butterfly (Parnassius apollo) resting on Viper's-bugloss (Echium vulgare) with mountains in background, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Apollo butterfly (Parnassius apollo) resting on Viper's-bugloss (Echium vulgare), Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Antlion (Palpares libelluloides) imago clinging to Lavender (Lavandula sp.) flower in lavender field, near Bratsigovo, Bulgaria. June.

Guy Edwardes / Eastern festoon butterfly (Allancastria cerisyi) resting among wildflowers, near Bratsigovo, Bulgaria. June.

Guy Edwardes / Eastern festoon butterfly (Allancastria cerisyi) resting on flower, near Bratsigovo, Bulgaria. June.

Guy Edwardes / Eastern festoon butterfly (Allancastria cerisyi) resting on flower, near Bratsigovo, Bulgaria. June.

Guy Edwardes / Spotted fritillary butterfly (Melitaea didyma) on Plantain (Plantago lanceolata) in wildflower meadow at sunset, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Glanville fritillary butterfly (Melitaea cinxia) resting on flower, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Lizard orchid (Himantoglossum hircinum) in flower, near Bratsigovo, Bulgaria. June.

Guy Edwardes / Spotted fritillary butterfly (Melitaea didyma) feeding on Mediterranean hartwort (Tordylium apulum) flower, near Bratsigovo, Bulgaria. June.

Tui De Roy / Floreana mockingbird (Mimus trifasciatus) perched on cactus flower, remnant population surviving on two small islets, Champion Islet, near Floreana Island, Galapagos Islands. January. Endangered.

Nick Upton / Wool carder bee (Anthidium manicatum) male, hovering near a Lamb's ear (Stachys byzantina) flower, patrolling its territory in a garden flowerbed, Wiltshire, UK. July.

Nick Upton / Wood-carving leafcutter bee (Megachile ligniseca) female, nectaring on Salvia flowers, Wiltshire garden, UK. July.

Nick Upton / Wood-carving leafcutter bee (Megachile ligniseca) nectaring on Water mint (Mentha aquatica) flowerhead in a garden pond, Wiltshire, UK. August.

Nick Upton / Red mason bee (Osmia bicornis) nectaring on Rosemary (Rosmarinus officinalis) flower, Wiltshire garden, UK. May.

Nick Upton / Fork-tailed flower bee (Anthophora furcata) female, visiting Lamb's ear (Stachys byzantina) flowers in a garden flowerbed, Wiltshire, UK. July.

Nick Upton / Fork-tailed flower bee (Anthophora furcata) female, visiting Lamb's ear (Stachys byzantina) flowers in a garden flowerbed, Wiltshire, UK. July.

Nick Upton / Yellow banded conops flies (Conops quadrifasciatus) pair, mating on a scabious flowerhead in a garden, Wiltshire, UK. July.

Nick Upton / Blue mason bee (Osmia caerulescens) female, nectaring from a Lamb's ear (Stachys byzantina) flower in a garden flowerbed, Wiltshire, UK. July.

Nick Upton / Blue mason bee (Osmia caerulescens) female, nectaring from a Lamb's ear (Stachys byzantina) flower in a garden flowerbed, Wiltshire, UK. July.

Roman Willi / European hornet (Vespa crabro) feeding on nectar from Arborescent ivy (Hedera helix arborescens) flower, Lucerne, Switzerland, September.

Roman Willi / European hornet (Vespa crabro) feeding on nectar from Arborescent ivy (Hedera helix arborescens) flower, Lucerne, Switzerland, September.

Daniel Heuclin / RF - Mojave indigo bush (Psorothamnus arborescens) in flower, Mojave National Preserve, Mojave desert, California, USA. May. (This image may be licensed either as rights managed or royalty free.)

Daniel Heuclin / Mojave indigo bush (Psorothamnus arborescens) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Mojave indigo bush (Psorothamnus arborescens) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Mojave indigo bush (Psorothamnus arborescens) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Mojave indigo bush (Psorothamnus arborescens) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Ocotillo (Fouquieria splendens) in flower, Chihuahuan Desert, Arizona, USA. May.

Daniel Heuclin / Ocotillo (Fouquieria splendens) in flower, Chihuahuan Desert, Arizona, USA. May.

Daniel Heuclin / Ocotillo (Fouquieria splendens) in flower, Chihuahuan Desert, Arizona, USA. May.

Daniel Heuclin / Creosote bush (Larrea tridentata) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Creosote bush (Larrea tridentata) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Creosote bush (Larrea tridentata) in flower, Mojave National Preserve, Mojave desert, California, USA. May.

Daniel Heuclin / Creosote bush (Larrea tridentata) in flower, Mojave National Preserve, Mojave desert, California, USA. May.