When is the sweet spot cited for the largest numbers of warbler migrants in the Midwest?

Answer

The second week of May

Timing is a critical factor in successful warbler viewing because the passage of these species is inherently brief. While the general peak migration period for many northern species extends from the second week of May into early June, the Midwest region has a more specific 'sweet spot.' In the Midwest specifically, the second week of May is frequently cited as the optimal time to observe the largest volume or numbers of migrating warblers moving through the area, before the season progresses too far north.

When is the sweet spot cited for the largest numbers of warbler migrants in the Midwest?
locationhabitatbirdavianwarbler