Sequence of Events
The pilot taxied the airplane from the parking ramp onto the parallel taxiway and proceeded to the runup area. After preparing for takeoff, the airplane was positioned on the runway and the takeoff roll began. At the start of the roll, the opposite end of the runway was not visible due to a hump near the center of the runway. Shortly after liftoff, the pilot observed birds rising from the opposite end. The airplane collided with the birds, prompting the pilot to abort the takeoff. The airplane then glided past the runway's end, touched down on a downhill slope, and collided with a chain linked fence.
Awareness of Bird Activity
Birds were known to flock to this airport, and the airport had publicized the presence of birds in the vicinity of the runway in several publications. The area where the birds flock, as well as both ends of the runway, are visible when taxiing out of the parking ramp. Additionally, a witness observed birds on the runway from the parking ramp.