Alert at the Decorah DNN Nest

Alert at the Decorah DNN Nest Here's a video of the incident at the DNN nest just after 10 AM on 3-25-17. Here is a flyby at about the 30 second mark. However, on closer inspection, I think this might be Mr North. Both parents were on alert for quite some time. The hatch watch window starts on 3-26-17.