1. Any of various small insectivorous birds of the northern hemisphere that climb about on trees; SYN. tree creeper.
2. Any plant (as ivy or periwinkle) that grows by creeping.
Any small, short-legged passerine bird of the family Certhidae. They spiral with a mouselike movement up tree trunks, searching for insects and larvae with their thin, down-curved beaks.
The brown creeper Certhia familiaris is 12 cm/5 in long, brown above, white below, and is found across North America and Eurasia.