The all-black rook is a sociable bird, so can be spotted in flocks or nesting colonies, known as 'rookeries'. Unlike the similar carrion crow, it has a grey bill and 'baggy trouser…

The tiny, brown-and-white sand martin is a common summer visitor to the UK, nesting in colonies on rivers, lakes and flooded gravel pits. It returns to Africa in winter.

The hawfinch is the UK's largest finch, with an enormous bill powerful enough to crush a cherry stone. Despite their size, they are typically elusive, especially during the summer nesting…

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…

Living up to its name, the white-tailed bumblebee is black-and-yellow bee with a bright white 'tail'. A social bumble bee, it can be found nesting in gardens and woods, and on farmland…

Look for the wood warbler singing from the canopy of oak woodlands in the north and west of the UK. Green above, it has a distinctive, bright yellow throat and eyestripe.

Like many of our birds of prey, the peregrine falcon was so persecuted, numbers fell dramatically. Thankfully, this super-speedy flyer is now making a comeback, particularly in our towns, where it…

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.