These presumed eastern Purple Martins Progne subis subis were two of the hundreds feeding low over Braunig Lake, San Antonio, Bexar county, Texas on March 09, 2014, along with thousands of Cave and Barn Swallows.
The first bird looks to be adult-like but with a couple of white feathers below; ALSO note the rather fresh-looking primaries, indicating a late molt typical of full adults and second-cycle birds (per Pyle):
The second bird looks to be adult-like; ALSO note the very worn looking-looking primaries - especially the inner and central Ps - indicating an early molt typical of first-cycle birds (per Pyle), which this is not...:
