The Treecreeper is a small active bird with a long down-curved beak and a long stiff tail. It can be found throughout England in woods, parks and gardens with mature trees. It climbs up trees by pressing its stiff tail against the trunk of a tree for support and uses its curved beak to try and find any insects hiding in the bark. The Treecreeper always climbs up trees, but never climbs down them. When it reaches the top of a tree, it flies to the next tree and climbs up that one.

The Treecreeper is a brown bird with darker and lighter brown stripes and markings on its body. It has a brown face with darker markings and a white stripe over each eye. The underside of this bird is white and its long tail is a rich orange-brown colour. Its wings look long and rounded when the Treecreeper is in flight.

Treecreepers seem to be on the move all the time and can be seen sometimes with flocks of tits, especially in winter. Although they are generally solitary birds, they do tend to roost in groups at night in tree crevices to keep warm. Treecreepers also make oval-shaped holes in redwood trees because they particularly like to roost in these trees at night.