Answer: cassowaries

AnswerCrossword Clue
CASSOWARIESFlightless birds that can run up to 40 m.p.h.
cassowariesCASSOWARY, (Malay) any large flightless bird of the genus Casuarius, related to the emu
cassowariesA very large flightless bird related to the emu, with a bare head and neck, a tall horny crest, and one or two colored wattles. It is native mainly to the forests of New Guinea