I am intrigued when birds nest, or at least "summer", outside of their
normal territories.
Have had two Nashville Warblers (including a probable juvy) and two
Olive-sided Flycatchers, as well as a White-throated Sparrow, in Sherburne
and southern Mille Lacs Counties here in central Minnesota (bit south of
standard). And species I normally would see here - like Dickcissels and
Upland Sandpipers - have been missing.
On the other hand have seen Common Moorhens, Hooded Warblers and Cerulean
Warblers in the same area, all a bit north of normal (Hooded, however, used
to nest here).
Perhaps it's just this transitional area. Perhaps this is light/subjective
evidence of spring migration undershoots and overshoots. Have read about
significant overshoots this spring in other areas of the country (eg, Blue
Grosbeaks & White-eyed Vireos in Canada). Our refuge biologist wondered
about it this morning. Your observations or thoughts?
Good birding to all.
Al Schirmacher
Princeton, MN
Mille Lacs & Sherburne Counties
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