a   70.|  ENVIRONMENTAL ENVELOPE FOR CALIFORNIA GNATCATCHER,
   n      |  Polioptila californica,  based on data in P.J. Mock (1988)                                                              
   n      |                                                                
   u      |                                                                
   a      |                                                                
   l      |                                                                
       60.|       .       .       .       .       .       .       .       .                                                                
   t      |                                                                
   o      |                                                                
   t      |                                                                
   a      |                                                                
   l      |                                                                
       50.|       .       .       .       .       .       .       .       .                                                                
   p      |                                                                
   r      |                                                                
   e      |                                                                
   c      |                                                                
   i      |                                                                
   p   40.|       .       .       .       .       .       .       .       .                                                                
   i      |                                                                
   t      |                                                                
   a      |                                                                
   t      |                                                                
   i      |                                                                
   o   30.|       .       .       .       .       .       .       .       .
   n      |                                                                
          |                                                                
   c      |                                                                
   m      |                                                                
          |                                                                
       20.|_______._______._______._______._______._______._______._______. 
         0.5     1.0     1.5     2.0     2.5     3.0     3.5     4.0     4.5

                           January mean minimum temperature (°C)