lpaul

I think all but the first photo are Northern House Martin.  I guess these are photos of the same bird posted a few days ago (which Mike Turnbull considered to be Northern, and which I did not!).  If so, sorry Mike, you are right and I was wrong!

There is no black below the bill, the underwing coverts are not black, the tail is long, and the underparts are very white except for an indistinct darker wash to the sides of breast.