The greylag goose can be easily spotted around parks, gravel pits and river valleys, but these populations tend to be semi-tame, having been reintroduced. Truly wild populations can be found in…

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.

The red mason bee is a common, gingery bee that can be spotted nesting in the crumbling mortar of old walls. Encourage bees to nest in your garden by putting out a tin can full of short, hollow…

Once a rare visitor to the UK, this striking gull is now found nesting here in large colonies.

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

Also known as the two-coloured mason bee, this beautiful bee is famous for nesting in old snail shells.

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!

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