Huge numbers of birds are also being killed by cars, too.

I'm not going to keep track of auto-killed birds during this fall-out because I honestly don't know how. But it's a horribly serious problem. I wrote about birds killed by cars in a similar fall-out in 1991 in my book For the Birds, and we've experienced at least four of these events since I lived in Duluth. They're rare enough to not warrant regular action, but huge enough to warrant emergency action, if people care enough to be willing to go along with lowering the speed limit on Hwy. 61 during these unique periods. 

Jo writes:

At the advice from Lisa Johnson regarding a post I made on Duluth Phenology Facebook page, I am emailing you to let you know that I have found a couple of dead warblers in my pasture, which is away from any roads or windows.  I'm pretty sure they were Yellow Rumps and I can go back out tomorrow and photograph them if I can relocate them.   I am on Korkki Rd about 1 mile west of Homestead Rd.  I am also seeing alot of dead warblers on the road and sadly, I know I have hit a number of them when I've been out.  Would you like any more information about them?

I will publish reports here, though these birds won't count within our running total of window-killed birds in the Duluth-Superior area.