I got a short note yesterday from Leslie Day that last year's nest fell from the London Plane tree by the Hudson River. 

"This afternoon I walked by the tree and  – no nest! I looked on the ground and there it was. Lots of ribbons, fabric and feathers and all the branches. I'm pretty sure it was exactly a year ago that the first nest fell down too. We had some big winds a few nights ago off the river."

It will be interesting if they choose a new location or return to the same tree later this winter.