The brown creeper or pīpipi (Mohoua novaeseelandiae) of the South Island and Stewart Island is the smallest of the three Mohoua species – 13 centimetres long. Males weigh 13.5 grams, females 11 grams. The head and back are brown, with a grey face and neck. Brown creeper numbers have fallen, but they remain in many areas of the Southern Alps, Nelson, Marlborough, Kaikōura, Banks Peninsula and the Catlins, living in exotic pine forest and scrub as well as mature native forest. Young birds move from tree to tree in flocks of up to 50, chorusing their sweet ‘peee–pee–pee’ call.