Surprisingly deer are not very scared of my little drone. Some of them seem even to be curious about the "big buzzing bug" so I was able to slowly stalk them up to less than 2 meters!
I flew this last July with a self-made 250-size miniquad. This sort of proximity flying in the woods is only possible in fully manual mode with a latency-free analogue video transmitter. Don't try this with a DJI Phantom or a similar video drones - you'll certainly crash it!
Setup:
Frame ZMR250 Carbon
Morors: Emax RS2205-2300KV
Props: DALProp CYCLONE Series T5045C
ESCs: Racerstar RS30A V2 30A Blheli_S
Battery: 4S 1400mAh
FC: AIO F3 V4
RX: TBS Crossfire micro
FPV cam: Runcam Swift
HD cam: GoPro Hero4
Music: "Wires Crossing Land" by Jani Rantanen