Blog Posts

April 22nd, 2014

Extremely stormy weather in the spring of 1996 caused unusually high mortality in birds migrating over Lake Michigan. This phenomenon was documented by Field Museum scientists at the time and a paper using radar images of both weather and bird migration has recently been published describing the convergent conditions that created it.

March 13th, 2014

When a swan dies in Chicago...

March 11th, 2014

Ducks spending the winter on the Great Lakes fought for survival during the harsh winter months of early 2014. Many did not make it. We explain why.

February 17th, 2014

It was a Boreal Owl kind of day.

February 07th, 2014

There is only one specimen of Yellow Palm Warbler from Illinois.

January 24th, 2014

Snowy Owls are back in the Chicago area in a big way, for the second time in three winters. I examined the contents of their pellets to see what they are eating.

January 16th, 2014

Barred Owl, meet chickadee.

December 18th, 2013

This is not the Accipiter we were expecting. Cooper's Hawks are common visitors to the Prep Lab, as are Sharp-shinned Hawks. But not Northern Goshawks. Goshawks are denizens of the northwoods, only rarely making forays as far south as Chicago.

October 17th, 2013

A few more details on the status of Northerly Island.

September 27th, 2013

There have been a lot of changes at Northerly Island over the last few months, most of them bad for birds and worse for birders. Learn the latest here.