Red squirrels are native to the UK but are a lot rarer than their grey cousins. They live in a few special places across the UK thanks to reintroduction projects.

A dark, stocky warbler, the Cetti's warbler is most likely to be heard, rather than seen - listen out for its bubbling song among willow, marsh and nettles.

The laughing 'yaffle' call of the green woodpecker can be heard in our woodlands, parks and gardens. Look out for it hopping about your lawn, searching for ants to eat.

At night, the pretty, white blooms of white campion produce a heady scent, attracting feeding moths. Look for this wildflower along hedgerows and roadside verges, and on waste ground.

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

From grunts and groans, to 'purring' and 'piglet squealing', the water rail is more often heard than it is seen! This shy bird lives in reedbeds and wetlands, hiding among the…

The lesser whitethroat is smaller than its cousin, the whitethroat, and sports dark cheek feathers that give it a 'mask'. Most likely to be heard around woodland and scrub, rather than…

Considered to be an early sign of spring, the song of the cuckoo sounds the same as its name: ‘cuck-oo’. It can be heard in woodlands and grasslands. Cuckoos famously lay their eggs in the nests…

The common lime is a tall, broadleaf tree that is a natural hybrid between the Large-leaved and Small-leaved Limes. It can be seen in a variety of habitats, and has been widely planted along roads…