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Excerpt from Cassinia, a Bird Annual, 1912, Vol. 16: Proceedings of the Delaware Valley Ornithological Club of PhiladelphiaSo far then as the report of this single season of 1791 is con cerned, it indicates that birds have not changed, during the last 100 years, their times of spring arrival.Two of Barton's birds have not been used in the above calou lation. One of these

Title : Cassinia, a Bird Annual, 1912, Vol. 16: Proceedings of the Delaware Valley Ornithological Club of Philadelphia (Classic Reprint)
Author : Delaware Valley Ornithological Club
Language : en
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Type : PDF, ePub, Kindle
Uploaded : Apr 06, 2021

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