Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
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Transcription
false impression, can not be stated at this time. Certainly more
survey and collecting would be needed to make a factually based
statement.
However, it is pertinent that during this survey there was a
marked variation in densities of the northern and southern areas of
the grid. For instance, the total average density for the northern
third of the grid was 2.17 birds per linear mile as opposed to 0.86
birds per linear mile for the southern third. The reasons for this
variation are not explained.