Flew through a bunch of large, light-colored(at least partially) birds crossing over Sacramento-Mather Field at about 2:30 A.M. at night after takeoff, in a B-727. At 2000 ft climbing and and 200 kts. A loud bang was felt below, (some went over us), but no other (e.g. engine) anomalies, so continued. Quite dark, don't remember a moon. In Seattle a large red bloody, feathery spot on the radome and fuselage at the radome/fuselage juncture, and glass fibers showing that the radome had been forced-in and rebounded too much(had to be replaced).
All aircraft lights were on. (at night, but with little other reference, it's probably hard for birds to judge what to do with their flight path, when they see lights, but no aircraft) And we can't see them at all, so we can't help.