Tuesday, May 31, 2005

Spring Migration 2005 Data

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This US map shows nocturnal bird migration via NexRad shortly after exodus on May 17th, 2005. Those swarms you see throughout the Ohio Valley, Midwest and clear down to south Texas are not storms…they’re birds!

John Idzikowski of Milwaukee keeps detailed records and monitors each night’s migration via NexRad during spring and fall. Often times he will email the Wisconsin Birding Network when migration is exceptional so birders have a “heads-up” for great birding the following morning. It's a great prognostication tool.

Here is a graph compiled by John showing NexRad for Milwaukee DBZ level by date for this spring:

(click on image for larger version)

John recently added a Spring Migration Summary to his website.

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