September 10:  The “hot corner” at Bluff Point State Park in Groton is a fall migration hot spot, where for ninety minutes or so beginning at sunrise one can sometimes view hundreds, if not thousands, of warblers and other passerines passing overhead. Most are fly-bys, but if the wind is right, a certain number will alight in the trees and provide a good opportunity to study “confusing fall warblers.” This morning the majority were American Redstarts, but there were also a good number of Black & Whites, Northern Parulas, and a smattering of others including this fall Magnolia Warbler that has none of the striking markings of the adult male.