Summary Sugg, M. St. J. 1974. Mensural and moult data from a breeding colony of Pied Kingfishers. Ostrich 45: 227–234. Pied Kingfishers were ringed over two breeding seasons at a breeding colony on the Kenyan shore of Lake Victoria. Data were collected on weight, wing and bill length, injury and moult. Bill abrasion and breakage from nest excavation was found in both sexes and regeneration of worn and broken bills was recorded. Adult birds of both sexes returned to the colony to breed but no juvenile was recaptured the year after hatching. Females are slightly larger than males (wing length) and both sexes showed a weight increase in the evening prior to roosting. Juveniles had shorter wings and bills than adults but their weights were similar. Their bills were short, soft, weak and the gape was salmon pink. No juveniles showed any moult. Adult moult records support the sequence and duration of moult suggested by Douthwaite (1971) though no overall decrease of moult activity was recorded during the breeding season.