The tree bumblebee is a new arrival to the UK. First recorded here in 2001, it is slowly spreading north. It prefers open woodland and garden habitats and can be found nesting in bird boxes and…

Swifts spend most of their lives flying – even sleeping, eating and drinking – only ever landing to nest. They like to nest in older buildings in small holes in roof spaces.

This elegant wading bird is a rare visitor to the UK, though occasionally one or two of pairs will nest here.

The all-black carrion crow does not nest in colonies like the similar rook. It can be seen almost everywhere.

The black sea bream really is a fascinating fish. From sex changes to nest building, this fish is full of surprises!

Red-necked grebes occasionally attempt to nest in the UK, but they're more often seen as winter visitors to sheltered coasts.

One of our largest and most impressive solitary wasps, the bee wolf digs a nest in sandy spots and hunts honey bees.

Mae llygoden yr ŷd yn fach iawn - gall oedolyn bwyso cyn lleied â darn 2c! Mae'n ffafrio cynefinoedd gyda glaswellt tal, ond rydych chi'n fwy tebygol o weld ei nythod crwn, glaswelltog…

The eider is a large seaduck, famed for its soft, downy feathers that are not only used by the bird to line and insulate its nest, but also by humans to stuff our quilts and pillows. It nests…

Our smallest breeding seabird, the storm petrel is barely larger than a house martin! They mostly nest among rocks or in burrows on small offshore islands.