DISTRIBUTION IN SPACE 107 



Hornbills, certain Cuckoos, and the Jungle 

 Fowls. The Australian Region may or may 

 not include New Zealand and the surrounding 

 islands, as we have already explained, but 

 otherwise is made up of Australia, New Guinea, 

 and all the other islands situated to the north of 

 that continent as far as Celebes, together with the 

 whole of Oceania (or the islands of the Pacific) 

 excepting the Galapagos. Amongst its vast and 

 varied avifauna mention may be specially made 

 of the Piping Crows, Birds of Paradise, Honey- 

 suckers, Lyre Birds, Frog-mouths, Cockatoos, 

 Mound Birds, Emus, and Cassowaries. The 

 Nearctic Region includes Greenland and the 

 whole of North America as far south as Mexico. 

 A special feature of its avifauna is the many points 

 of similarity between it and that of the Palaearctic 

 Region, but amongst its most characteristic forms 

 we may name the Wood Warblers, the Greenlets, 

 Blue Jays, Tyrant Birds, Hangnests, Mocking 

 Birds, W^ild Turkeys, and Turkey Vultures. The 

 Neotropical Region comprises the remaining 

 portions of the American continent, from Mexico 

 southwards to Cape Horn and the few outlying 

 islands of the southern seas. This region is 

 perhaps the richest of all in birds, among some 

 of its special and most dominant groups being 



