eastern and southwestern Mexico south to Guatemala (Fig. 22). 

 During spring migration the birds appear first in western Texas and 

 the southern parts of New Mexico and Arizona about April 20 (Fig. 

 23). By April 30 the vanguard has advanced evenly to an 

 approximate east-west line across central New Mexico, Arizona, and 



Figure 22. Breeding and wintering ranges of the western tanager. See Fig. 23 for the 

 spring route taken by the birds breeding in the northern part of the range. 



78 



