« EelmineJätka »
Order, Family, and
Range within the Region.
Range beyond the Region.
Mexico to 20° S. Lat. 634. Catharista Mexico to 40° S. Lat.
s. United States 635. Pseudogryphis Mexico to Falkland Ids., Cuba, United States
FALCONIDE. 636. Polyborus 637. Ibycter ... ... 638. Circus ... 639. Micrastur 640. Geranospiza ... 641. Antenor... ... 642. Astur ... ... 643. Accipiter ... 644. Heterospizias ... 645. Tachytriorchis 646. Buteo ... ... 647. Buteola ... ... 648. Asturina ... 649. Busarellus ... 650. Buteogallus ... 651. Uruhitinga ... 652. Harpyhaliæetus 653. Morphnus ... 654. Thrasaëtus ... 655. Lophotriorchis 656. Spiziastur ... 657. Spizaëtus ... 658. Herpetotheres... 659. Nauclerus ... 660. Rostrhamus ... 661. Leptodon ...
2 The whole region
California and Florida
Mexico to Bolivia and La Plata S.E. United States
Veragua to Chili & N. Patagonia
'Africa, India, Malaya
S. United States
Califor., Old World trop.
South United States
662. Elanus ... ...
Peculiar or very Characteristic Genera of Wading and Swimming Birds.
Chionis ... ... | 2 Sts. of Magellan, Falkland Ids.
Palamedea ... 1 Equatorial America
Chauna ... ... | 2 Columbia, Brazil, and La Plata
Cairina... ... 1 Tropical S. America
THIs region consists almost wholly of Temperate North America as defined by physical geographers. In area it is about equal to the Neotropical region. It possesses a vast mountain range traversing its entire length from north to south, comparable with, and in fact a continuation of the Andes, and a smaller range near the east coast, equally comparable with the mountains of Brazil and Guiana. These mountains supply its great riversystem of the Mississippi, second only to that of the Amazon; and in its vast group of fresh-water lakes or inland seas, it possesses a feature unmatched by any other region, except perhaps by the Ethiopian. It possesses every variety of climate between arctic and tropical; extensive forests and vast prairies; a greatly varied surface and a rich and beautiful flora. But these great advantages are somewhat neutralized by other physical features. It extends far towards the north, and there it reaches its greatest width; while in its southern and warmest portion it suddenly narrows. The northern mass of land causes its isothermal lines to bend southwards; and its winter temperature especially, is far lower than at corresponding latitudes in Europe. This diminishes the available area for supporting animal life; the amount and character of which must be, to a great extent, determined by the nature of the least favourable part of the year. Again, owing to the position of its mountain ranges and the direction of prevalent winds, a large extent of its interior, east of the Rocky Mountains, is bare and arid, and often almost desert; while the most favoured districts, those east of