Could you say you mistook it for a pigeon?
As they are controlled over wifi i wonder if some sort of transmitter and directional antenna type arrangement could be used to interrupt the pilot?
What happens to them if they lose contact with the device controlling them - do they just hover, do they land or do they just go off and do their own thing?
Most of the recent upmarket models have GPS and if lose signal through distance or height,or battery power drops below safe they autopilot RTB( return to base)back to takeoff location and controlled landing
Less sophisticated ones will power down and land where theyre out of range.
Basic models will just crash as they require a continuous radio signal to maintain open throttle.
All of the professional drones i know of in use have sophisticated onboard GPS and autopilot RTB and FPV so the operator can see from the drones perspective where it is flying via goggles or screen display.
Have 5.8gightz dual radio link with at least couple of kilometre range.
You really wouldnt want to lose one of those babies, they cost thousands.