HETEROTHERMY IN HOMEOTHERMS 



WORLD 

 CLIM4TES 



• RANGE OF 

 ADAPTATION 



,:: T 



200 • IHOS 



... i 



TV' 



Figure 1. Temperature ranges for which warm-blooded animals 

 are physiologically adapted compared with those of the world's cli- 

 mates. Redrawn from Figure 16. page 33, 'TBI rds of Anaktuvuk Pass. 

 Kobuk, aal Old Crow." BuUetln 217, U. S. National Museum. 1960. 



Figure 2. Mean body temperature of arctic and subarctic birds 

 and mammals. Figure 6, page 677, "Body Temperatures of Arctic 

 and Subarctic Blnls and Mammals." JAP. 6(ll):667-680. 1954. 



135 



