CREEPER, BROWN, the name given to the North Ameri can subspecies of the small brown forest bird known in Great Britain as the tree-creeper (q.v.) . In the eastern states the form is Certlaia familiaris americana; the Mexican creeper (C. f. al bescens) ; the Rocky Mountain creeper (C. f. montana) ; the California creeper (C. f. occidentalis) ; the Sierra creeper (C. f. zelotes), are very similar in colour and habits.