Cave Swallow vs Barn Swallow, vs ? Troy Meadows Wetlands, Parsippany - New Jersey (1 Viewer)

[rascolnicov]

Bird with blue back: thinking Cave swallow, since belly is white (hence not barn swallow), is this correct?
Brown back bird: Northern rough winged swallow?

Thank you.

 

[THE_FERN]

Barn swallow and Northern roughwing. Barn because (eg) red forehead doesn't extend behind the eye and there is no pale neck. I imagine the reddish underparts are quite variable (as they are here) and I see females are paler.

 

[rascolnicov]

Barn swallow and Northern roughwing. Barn because (eg) red forehead doesn't extend behind the eye and there is no pale neck. I imagine the reddish underparts are quite variable (as they are here) and I see females are paler.

Good learning experience for me, thank you.
Indeed, upon a closer look I see some (females?) barn swallows have white bellies.