Threatened Nearctic faunal realm

Name(s): 
Threatened Neartic faunal subregion
Nature 
***.
Background 
The Nearctic biogeographic realm was a part of the Arctogaean faunal realm in the older system which divided the globe into three faunal realms: Neogaean (New World), Notogaean (Australasia) and Arctogaean (Old World).
Type 
(C) Cross-sectoral problems