16 locations were noted for 20+ warbler days:
Hillside Trail, MN Valley NWR
Richardson Nature Center
Rice Lake State Park, Steele County
Gunflint Trail (end of May)
Sucker Lake, Vadnais Heights
Red Lake WMA
Itasca State Park
Kathio State Park
Aitkin CR 18
Myre Big Island State Park
Park Point, Duluth
Only four birders, all in the Twin Cities, mentioned yard lists of 20+ warblers.
An old piece of information states that the state record for warblers in a day is 26, which seems a bit low. Still true?
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