THEY'RE BACK ~ The Channel-billed Cuckoos. TURN YOUR SPEAKERS UP :) HAVE you been hearing their calls at night? They have been described as "Noisy, Migratory, Parasitic". The channel-billed cuckoo is the world's largest cuckoo, measuring between 58–66 cm long and weighing between 550–935g. The migration route is across the Torres Strait, travelling individually or in small groups. From New Guinea they migrate across the nearby islands as far as Timor and the Moluccas. Migrating channel-billed cu