Just an aside, I was doing a demonstration (too many trees) in the backyard (only going abut 10ft) on Memorial Day for some friends and my P3 must have taken out a couple thousand insects (mostly of the small gnat variety). Do they make a bug shield for the P3? ;-)
Stay away from them and fly somewhere else, they're most likely nesting and being protective of their eggs or chicks.
Or you could keep flying but there are plenty of smashed drones due to bird attacks.
I was flying in a Regional Park (read LARGE) yesterday and was attacked by several Mockingbirds, they were dive bombing the quad just like they do the Hawks, must have gotten to close to their nests. Took off at full speed and after a few hundred feet they broke off contact. I fly with prop guards in the park (safety first) but I don't think they would help in a bird strike.
Find a small lightweight cat. A feral cat of any breed would be preferred although they are harder to handle and strapping them on & removing them from the Phantom is a bit trickier. Feed it birds between flights to keep it's natural bird killing instincts finely honed.