The treecreepers (Certhiidae) are a family of small passerine birds. Their plumage is dull-coloured, and as their name implies, they climb over the surface of trees in search of food.
Treecreepers bills are gently down-curved and rather long, used for probing bark for insects and spiders. They often climb up tree trunks in a helical path, hopping with their feet together; their toes are long and tipped with strongly curved claws for gripping. Their songs and calls are thin and high-pitched.