are a family
, of small passerine birds
, widespread in wooded regions of the Northern Hemisphere
and sub-Saharan Africa
. Their plumage is dull-coloured, and as their name implies, they climb over the surface of trees in search of food. Treecreepers measure from 12 to 18 centimetres in length. Their 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.
From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Treecreeper