GEOGRAPHICAL DIFFERENTIATION IN THE CHANNEL-BILLED CUCKOO SCYTHROPS-NOVAEHOLLANDIAE LATHAM, WITH DESCRIPTION OF 2 NEW SUBSPECIES FROM SULAWESI AND THE BISMARCK ARCHIPELAGO

Geographical differentiation in the Channel-billed Cuckoo Scythrops no vaehollandiae Latham is reviewed in relation to sexual dimorphism, sea sonal dispersal and regional breeding. Marked sexual dimorphism in siz e is recorded in all regions, with the exception of the Bismarck Archi pelago. Three subspecies are recognised: nominotypical novaehollandiae in subcoastal northern and eastern Australia, New Guinea and the Molu ccas, fordi in Sulawesi and schoddei in the Bismarck Archipelago. The latter two subspecies are described here as new.