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April 2012

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From:
Dave Horn <[log in to unmask]>
Reply To:
Dave Horn <[log in to unmask]>
Date:
Sun, 15 Apr 2012 23:26:39 -0400
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Hello Ohio Birders,

Because of all the posts regarding red admirals I thought I'd comment.  The red admiral has periodically appeared in large numbers since the early 19th century.  While there is no universally accepted explanation for these increases it seems most likely that they are related to high overwintering survivorship in the southern USA followed by favorable conditions for northward movement.  This year we have had both a very mild winter (in Ohio and southward) and an early spring and I suspect the large numbers we are seeing reflect those weather conditions.  

Dave Horn
Columbus
(President, Ohio Lepidopterists) 




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