Birds per Linear Mile per day Number of Species per day 
12 
20°N. 18 16 lU 12 10 8 6 i, 2 0 2 ii 6 8 10 12 lli 16 18 20°S. 
Longitude ^ ^ 
Figure A Comparison of Birds per Linear Mile per day and Species per day along 105 W. and 112 w. 
Each point represents noon positions: 
112^W.» 
