Help with Tern ID in Wyoming

[okaugust]

Good afternoon,

I admit up front these are not the clearest views, but I thought perhaps someone with more tern experience and chops might see anything I'm missing that would help nail down the ID on these guys.

May 2nd, 2020, Boysen Reservoir, Tough Creek Campground, WY

Unfortunately it was almost dusk when we got there, so by the time I worked my way from the east end of the campground to the west the light was getting bad when they flew over. Partially into the sun and getting darker at the same time. There were Caspian Terns on the east end of things. This is the check list if it helps.

https://ebird.org/checklist/S68291368

 

Thank you!!!

 

[akandula]

These are both Forster's Terns. Note the frosty primaries, very long tail, and light orange bill.

[Sneat]

Agree with @akandula

[okaugust]

Thank you!