CALIFORNIA GNATCATCHER, Polioptila californica, presence/absence

Location          Jan mean temp ° C   annual * precip cm   gnatcatcher y=1 n=0

Alpine                          3.4                   36                     0
Barrett Dam                     1.0                   44                     0
Beaumont                        3.5                   44                     0
Campo                           1.5                   38                     0
Julian                          2.0                   63                     0
Newhall                         4.2                   46                     0
Oak Grove                       1.3                   36                     0
Ojai                            2.1                   53                     0
San Jacinto                     2.7                   31                     0
Sun City                        2.1                   39                     0
Canoga Park                     4.4                   41                     1
East El Cajon                   2.6                   32                     1
East Ramona                     2.5                   35                     1
Elsinore                        3.0                   30                     1
Escondido                       2.6                   40                     1
Pomona                          3.4                   45                     1
Ramona                          3.7                   46                     1
Redlands                        3.9                   34                     1
Riverside                       4.0                   27                     1
San Bernardino                  3.8                   43                     1

Source:  values interpolated by C.M. Rodrigue from Figure 2, P.J. Mock (1988),                  
     Energetic constraints to the distribution and abundance of the California                  
     gnatcatcher, Western Birds 29: 413-420.