These different species?
Mostly DCCO but maybe some NECO-like birds mixed in.
Great Black-backed Gull and Double-crested Cormorant
Sadly, the Cormorant on the left appeared to have swallowed something attached to the cord and was violently trying to shake the cord free. Called a rehabilitator, but almost impossible to rescue if the bird is able to fly or dive underwater. Distressed bird was missing two days later. A solo Cormorant was still present.
Carolyn Holmberg Preserve at Rock Creek Farm, Boulder County, Colorado