Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
Number of Species per day
12
11
10
9
8
7
6
5
4
3
2
1
Birds per Linear Mile per day
8
7
6
5
4
3
2
1
20°N. 18 16 14 12 10 8 6 4 2 0 2 4 6 8 10 12 14 16 18 20°S.
Longitude
Figure 1. A Comparison of Birds per Linear Mile per day and Species per day along 105°W. and 112°W.
Each point represents noon positions:
105°W.=
112°W.=
-28-