Listen out for the 'chattering' song of the reed warbler, while wandering the UK's lowland wetlands in summer. A small, brown bird, they are quite hard to see.

This sponge is found on rocky shores around the UK and looks like a thick bready crust (if you use your imagination a bit!).

This well-camouflaged wader is a winter visitor to the UK, where it can be seen feeding on wetlands with a distinctive bobbing motion.

This colonial creature looks like an old-fashioned quill - that's where the name sea pen comes from.

A member of the buttercup family, Common water-crowfoot displays white, buttercup-like flowers with yellow centres. It can form mats in ponds, ditches and streams during spring and summer.

Who doesn’t love spotting rabbits hopping through long grass during a walk in the countryside? They are a common sight but it is always a treat to see their curious faces popping up, ears stood…

The stinging nettle is a familiar and common plant, often firmly rooted in our memories after our first, hands-on experience - a prickling irritation that's not forgotten easily!

This small duck is an uncommon winter visitor to the UK, where they're usually found on lakes, reservoirs and gravel pits.