I'm not sure they've demonstrated adequate support that a bird strike can be equated to a drone collision. Drones are plastic and metal, versus the very light a

I'm not sure they've demonstrated adequate support that a bird strike can be equated to a drone collision. Drones are plastic and metal, versus the very light and porous structure of avian bones and musculature. Additionally, you can't just do this sort of probability calculation when the human operator is an integral part of the equation. Birds don't fly in an area limited by their operator. And birds aren't (as far as we know) going to try to fly their drone over an airport (for one example) to get some unique footage that has market value. This really seems like a vast oversimplification of the issue at hand. I'd much rather see them firing a drone out of a canon at high velocity into an aircraft cockpit (a la MythBusters chicken gun) to show what the actual damage of a comparable drone strike would be rather than just assuming "drone == small bird" based purely on a mass of 2kg.