I have spent almost every weekend of the first half of summer for 15 years at Jackson and this is the first time I have seen this. We always see Double-crested Cormorants hanging around but never in the numbers we saw this weekend.
Dozens upon dozens (hundreds?) of them on the water. A very unusual scene but also kind of cool. Not sure why they chose to congregate here in these numbers.
Taken yesterday at Jackson Lake State Park in northeastern Colorado.