Headsethair:
Most animals don't give a hoot about helicopters.
I think the Northants air ambulance might dispute that - I hear one keeled over and died on them recently when they landed nearby, and another owner threatened to sue because of an injury to another!
Threatening to sue an air ambulance could backfire if you ever needed them at the same location..... it's reasonable to assume that the location would not blacklisted by their insurers
BW