Tony Wu / Siberian flying squirrel (Pteromys volans orii) carrying sticks of Japanese elm (Ulmus davidiana var. japonica) back to nest; enjoying eating one before entering nest. Hokkaido, Japan. February.
Marie Read / Ruby-throated hummingbird (Archilochus colubris) male flies in to feed on nectar from Eastern red columbine flower (Aquilegia canadensis), Freeville, New York, USA, June.
Marie Read / Eastern bluebird (Sialia sialis) male feeding on Winterberries (Ilex verticillata) before flying off, Freeville, New York, USA, January.
Robert Thompson / A fallen Sweet chestnut fruit (Castanea sativa) lying on the woodland floor, with a tree trunk covered in Textured lungwort (Lobaria scrobiculata) lichen, UK. October.
Oliver Wright / Marbled white butterfly (Melanargia galathea) sequence showing landing and taking off from a Greater knapweed (Centaurea scabiosa) flower. Yorkshire, UK. Digital composite.
Lewis Jefferies / Blackfinned anemonefish (Amphiprion nigripes) family seeks shelter in safety of Anemone's stinging tentacles, South Ari Atoll, Maldives, Indian Ocean.
David Pattyn / Great crested grebe (Podiceps cristatus) with young chicks on the back among Fringed water lilies (Nymphoides peltata) Lake Kerkini, Greece, July.
Nick Upton / White stork (Ciconia ciconia) with three chicks in nest at top of an Oak tree, gaping in hot sunshine with one exercising its wings, Knepp Estate, Sussex, UK, June.
John Cancalosi / Gila Woodpecker (Melanerpes uropygialis) bringing food to nest in Saguaro cactus (Carnegiea gigantea) before leaving, Sonoran Desert, Arizona, USA.
John Chan / Monarch Butterfly (Danaus plexippus) nectaring on a Sweet scabious (Scabiosa atropurpurea), Orange County, California, USA, May.
Carlos Zorrilla / Male Orchid bee (Euglossini sp.) on an orchid (Lycomormium ecuadorense) flower trying to remove pollinia attached to its back, Ecuador, April.
Nick Upton / Common carder bumblebee (Bombus pascuorum) nectaring on a Dandelion (Taraxacum officinale) flowerhead among many Common daisies (Bellis perennis) on a lawn left unmown to allow wild flowers to bloom t...
John Chan / Monarch butterfly (Danaus plexippus) taking flight from a Pride of madeira (Echium candicans) after contact with a Honey bee (Apis mellifera), Southern California, USA, April.
Tony Wu / Female Northern pygmy squid (Idiosepius paradoxus) depositing eggs on a blade of eelgrass (Zostera marina), Yamaguchi Prefecture, Japan.
Tony Wu / Female Northern pygmy squid (Idiosepius paradoxus) preparing to lay another egg on a blade of eelgrass (Zostera marina), Yamaguchi Prefecture, Japan.
Rose Summers / Eurasian beaver (Castor fiber) swimming over to a willow, it clambers on to a branch before beginning to feed on the surrounding leaves, Devon, England, UK.
Solvin Zankl / Female Acorn weevil (Curculio glandium) boring into oak tree acorn to lay eggs, Lower Saxonian Elbe Valley Reserve, Germany, September.
John Chan / Group of Brent geese (Branta bernicla) foraging in Eelgrass (Zostera marina) bed, Bolsa Chica Ecological Reserve, Southern California, USA, March.
Brian Bevan / Melanistic grey squirrel (Sciurus carolinensis) searching for, finding and eating chestnuts amongst autumn leaves, Bedfordshire, UK, October.
Brian Bevan / Grass snake (Natrix natrix) at pond edge sensing with tongue, Bedfordshire, UK, September.
Brian Bevan / Grass snake (Natrix natrix) sensing with tongue while swimming through duckweed in pond, Bedfordshire, UK, September.
Shane Gross / Red mangrove (Rhizophora mangle) propagules / plantlets which become fully mature plants before dropping off the parent tree to drift away and establish a new tree. Bahamas.
Ross Hoddinott / Common blue butterfly (Polyommatus icarus) resting on Devil's bit scabious (Succisa pratensis). Devon, England, UK. August.
Guy Edwardes / Bonnet mycena fungus (Mycena galericulata) and Holly (Ilex aquifolium) seedling, New Forest National Park, England, UK. October.
Staffan Widstrand / Wild Wonders of China / Banyan fig tree (Ficus benjamina), one single individual tree, Banyan garden protected forest, Kenting National Park, Taiwan
Jack Dykinga / Desert lilies (Hesperocallis undulata) flowering in spring on dunes at dawn. Mohawk Dunes, Barry M. Goldwater Range, Sonoran Desert, Arizona, USA.
Stephen Dalton / Orange tip butterfly (Anthocharis cardamines) male in flight amongst Lady's smock or Cuckooflower (Cardamine pratensis),England.
Shane Gross / Dugong (Dugong dugon) feeding on Tapegrass (Halophila stipulacea), accompanied by juvenile Golden trevally fish (Gnathanodon speciosus). Marsa Alam, Egypt.
Jack Dykinga / Horseshoe Bend of the Salt River with Saguaro cacti (Carnegiea gigantea), Arizona, USA.
Jack Dykinga / Saguaro cacti (Carnegiea gigantea) Cabeza Prieta National Wildlife Refuge, Arizona, USA.
Shane Gross / Lemon shark juvenile (Negaprion brevirostris) swimming in mangrove habitat near blue crab (Callinectes sapidus), a prey species for the shark. Eleuthera, Bahamas.
Shane Gross / Lemon shark juvenile (Negaprion brevirostris) trying to feed on the leaves of a red mangrove (Rhizophora mangle). As pups, the sharks have to learn to hunt for themselves and sometimes make mistakes....
Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) and Boojum tree (Fouquieria columnaris) in Sonoran Desert, rainbow in background. Catavina, Valle de los Cirios Reserve, Baja California, Mexico.
Paul Harcourt Davies / Species rich alpine meadow with Orange lily (Lilium bulbiferum), Meadow clary (Salvia pratensis) and Yellow rattle (Rhinathus sp). View towards Campitello di Fassa and mountains, Fassa Valley, Dolomit...
Shane Gross / Green turtle (Chelonia mydas) feeding on Turtlegrass (Thalassia testudinum) seagrass bed. The Bahamas.
Jack Dykinga / Joshua Trees (Yucca brevifolia) of the Mojave Desert at dawn encircled with flowering lupines. (Lupinus sp,) Mohave County, Castaneda Wash, Arizona, USA.
Edwin Giesbers / RF - White-legged damselfly (Platycnemis pennipes) peering over Oxeye daisy (Leucanthemum vulgare) flower. The Netherlands. August. (This image may be licensed either as rights managed or royalty free...
Edwin Giesbers / Orange tip butterfly (Anthocharis cardamines), two females on Cuckooflower (Cardamine pratensis) in marshy grassland, egg visible on stem. April 2009.
Edwin Giesbers / Orange tip butterfly (Anthocharis cardamines) two females on Cuckooflower (Cardamine pratensis). The Netherlands. March.
Juergen Freund / Firefly (Lampyridae) trails on beach at night, Palm tree silhouetted against milky way. Oak Beach, Port Douglas, Far North Queensland, Australia. 2016.
Lukas Schaefer / Cotton grass (Eriophorum scheuchzeri) swaying in the wind, Puster Valley, Northern Italy, June.
Lukas Schaefer / Tracking shot of Cotton grass (Eriophorum scheuchzeri) backlit, Puster Valley, Italy, June.
Ingo Arndt / Blue tit (Cyanistes caeruleus) perched on tip of a Teasel (Dipsacus fullonum) Hessen, Germany. November.
Ingo Arndt / Blue tit (Cyanistes caeruleus) perched on Teasel (Dipsacus fullonum), Hessen, Germany. November.
Ingo Arndt / Female Great spotted woodpecker (Dendrocopos major) perched on Birch tree (Betula sp.) feeding in winter, Hessen, Germany. November.
Ingo Arndt / Great tit (Parus major) perched on Wild teasel (Dipsacus fullonum) stem, Hessen, Germany. November.
Ingo Arndt / Marsh tit (Parus palustris) on Blackthorn (Prunus spinosa) branch with berries, Hessen, Germany. November.