If the aircraft entered cloud or rain the remains of a bird is washed away.
Domes do not collapse " spontaneously" , ever!
Seagulls is my preferred pray, record is 10 in one go. Just after V1.
Moto; Better 10 on the wings then one in the engine!
Remarkably little left to clean up when checking for damage.
My money is on a small bird, five cents worth.