those are wonderful Brant!
here a few of a bird i don't know, i think they are migrating, let me know if you can think of what they are.
EDIT: they are Double-crested Cormorants, the were about 50 of them spread along the river.
https://i.imgur.com/S2178K9.jpg
https://i.imgur.com/b4iG3Rt.jpg
https://i.imgur.com/lJc0ukc.jpg