Trying to develop a numerical feel for warbler migration hotspots in the state. Couple (maybe more) questions:
* Where in the state have you seen 20+ warblers in a day?
* Do you have 20+ warblers on your yard/property list? If so, where (in general) do you live?
Personal answers would be Sherburne NWR, Kathio, Hennepin (and perhaps Aitkin CR 18, would have to dig for the details) - and, not a chance, only have seven, no trees.
Should there be sufficient response, will be happy to correlate & post (maintaining anonymity).
Good birding to all!
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