Ismaele Tortella / Black-legged kittiwake (Rissa tridactyla) nesting above a window, Lofoten, Norway, August.

Morley Read / Brood chambers inside a Termite (Isoptera) nest with workers tending eggs, Napo Province in the Ecuadorian Amazon. Slow motion. (non-ex)

Morley Read / Slow motion clip of a queen termite (Isoptera) in chamber, with workers gathering liquid containing pheromones exuded from the queen's rear end, Ecuador. (non-ex)

Morley Read / Queen Termite (Isoptera) tended by workers in nest chamber, Napo Province, Ecuadorian Amazon. (non-ex)

Morley Read / Slow motion clip of a Spiny orb-weaver (Micrathena sp.) weaving a silk nest to protect its eggs, the nest is suspended from a thread to isolate it from predators, Amazon rainforest, Ecuador. Filmed at...

Jami Tarris / Caribou (Rangifer tarandus) entering teepee for food, Khovsgol, Mongolia

Danny Green / Brunnich's guillemot (Uria lomvia) colony in mist, many birds in flight and nesting on cliffs. Svalbard, Norway, July 2018.

Phil Savoie / Yellow legged mining bee (Andrena flavipes) female at nest burrow, River Monnow, Monmouthshire, Wales, UK, April.

Neil Anderson / Red squirrel (Sciurus vulgaris), two curled up asleep in drey inside nest box. Nest of lichen and Pine needles. Highlands, Scotland, UK. Medium repro only.

Clay Bolt / Wallace's giant bee (Megachile pluto) and nest on tree trunk. North Moluccas, Indonesia.T his is the only photo that is known to exist of this species (the world's largest bee) in the wild, in situ, a...

David Woodfall / Hedge which has been 'netted ' to prevent breeding birds nesting, which would delay building development of new homes. The tree in the background has also been cut back. Chester, Cheshire, Eng...

Alex Mustard / Pair of Western clown anemonefish (Amphiprion ocellaris) spawning orange eggs on the rock beneath their Magnificent sea anemone (Heteractis magnifica) home on a coral reef. This photo shows the larger...