Ruff male displaying to female
Little bustard male displaying
Male and female spotted flycatchers
Eurasian spoonbill breeding plumage
Upland goose female and male
Indian peacock displaying
Great crested grebe with material for nest-building
Male ruff in breeding plumage
Western grebe with egg
Western grebe on its nest
Eurasian spoonbill courtship display
Blue-tailed bee-eaters mating
Pied avocet pair mating
Male pheasant displaying
Indian river terns preening
Western grebe courtship display
Ringnecked parakeets mating
Brown booby pair
Monkey beetle feeding
Mating green tiger beetles
White storks courting
White stork courtship display
Namaqua dove female and males
Inca tern breeding pair
Cape gannet feeding its chick
Gentoo penguins pair bonding
Brown hare in a field
Common moorhens nesting
Red-collared lorikeets
Great spotted woodpecker and chick
Male Victoria's riflebird displaying
Blue tit taking off from nest hole in nestbox
Mendelian inheritance chart
Puma cub with its mother
Ringed seal pup
Kangaroo joey
Emperor penguin breeding pair
White-crowned lapwings mating
Pheasant displaying
Blattellid cockroach courtship
Common four-ring butterflies mating
Hairy dragonflies mating
Flies mating
Little owl chicks
Little owl chick
Sociable weavers at their nest
Emperor penguin and chick
Mallards mating
Woodlice courtship
Masked rabbitfish pair
Buff-tailed bumblebees mating
Mantled guereza mother and baby
Little owl mating couple
Cattle egrets feeding around cattle
Common house martin leaving nest
Semaphore flies
African black oystercatchers mating
Red-footed falcons mating
Asian mantis eating her mate
Florida, Sanibel Island, Ding Darling NWR, Reddish Egret preening
Blackbird mother feeding a fledgling
Emperor penguin grooming its chick
Emperor penguin feeding its chick
Emperor penguin and chick grooming
Emperor penguins and chicks
Male capercaillie displaying
Nereididae polychaete worms spawning
Yellow spotted grasshoppers mating
Leaf beetles mating
Gentoo penguin and egg
Male Kori bustard in courtship display
Gentoo penguins
Wandering albatross pair
Australasian gannets
European bee-eaters
Female Victoria's riflebird during courtship
Satin bowerbird at bower
Black-bellied bustard male in courtship display
Lions mating
Gentoo penguin
Chinstrap penguins nesting
Little tern eggs
Verreaux's sifaka mother and baby
Triplefin blennies
African lion in oestrus
Crane flies mating
Treehopper larvae and adults
Wasp nest
Southern elephant seal pup
Dead-leaf bush crickets mating
Mating dead-leaf bush crickets
Green tiger beetles mating
Flightless dung beetle with dung ball
Gemsbok male and female
Indian river terns greeting
Little owl at a nesting site
Little owl
Common sandpipers, 19th century artwork
Group of ostriches
Emu
Caspian terns nesting
Adelie penguins
Greater prairie-chickens
Greater prairie-chickens during mating dance
Greater prairie-chickens mating ritual
Greater prairie-chicken during mating ritual
Bigfin reef squid
Sea spider with larval cocoons
Kori bustard displaying
Florida, Sanibel Island, Ding Darling NWR, Reddish Egret pair hunting together
Florida, Sanibel Island, Ding Darling NWR, Reddish Egret, hunting, Wings Raised to create shadow food in bill
Florida, Sanibel Island, Ding Darling NWR, Reddish Egret windblown Feathers
Florida, Sanibel Island, Ding Darling NWR, Reddish Egret, hunting, Wings Raised to create shadow
Pied avocet on nest
Ostriches with chicks
Emperor penguin pair and chick
Atlantic bobtail squid mating
White plume moths mating
Common woodlice mating
Black-browed albatrosses with their young
Pair of black-necked grebes
Pair of black-winged stilts
Purple-crowned fairy hummingbird nesting
Black-legged kittiwakes
Male common pheasant
Ostrich chick
Ostrich with eggs
Shag eggs
Greylag goose and goslings
Emperor penguin chick
Emperor penguin chicks
Cassowary egg
Emu egg
Ostrich egg
Blue-footed booby on nest
Brown booby parent and chick
Brown booby parents and chick
Gull eggs in a nest
Barn owl chick hatching out of eggshell
Newly hatched chick props its head on an unhatched egg
Chick coming out of a shell
Chinstrap penguin courting display
Southern rockhopper penguins courting
Imperial shag pair courting
Mute swan pair
Brunnich's guillemots on a cliff
Ringed seal mother and pup
Spotted flycatcher