What kind of bird is this? Im stumped!

Hey everyone,

I came across two birds in Bethlehem PA last week that I cant identify. I managed to get a few very poor photographs of them but they were extremely skittish and would only stay on the other side of the river. I followed them for some time, even under a bridge, trying to get closer but couldn't get anything better before they flew off. I have no clue what they are but they were pretty neat looking! Im going to guess it was a mated pair, they didnt both look exactly the same.

Thank you in advance for any thoughts or pointers on what they could be. Always learning.

Here are some heavy crops of the images so that you can see the birds in question:

Common Mergansers

cpeay wrote in post #14151116
Common Mergansers

Thank you very much! I looked and that seems to be exactly right. I just wish I could have gotten closer, they were neat. Never seen them in my area before this.

Yup, confirmed The male is the white one with the green head.