Chicago is in the midst of a snowy owl invasion! We talk with a birder and a Field Museum scientist looking to uncover the hidden city dangers facing these beautiful creatures on Chicago Tonight at 7:00 pm.

Check out some of birder Jerry Goldner's photos and videos of snowy owls below.

In the following video, the Field Museum's Josh Engel describes the biology of owl pellets.

Check out some of Jerry Goldner's photos in the image gallery below.