Data and analysis
We recorded each flight with the Blackmagic Video Assist (thermal), a Panasonic GH5 4K video camera and a GoPro 3 camera mounted to the rear firewall of the helicopter. Both the Blackmagic and the GoPro recorded the flight audio.  Audio was used to determine the total number of shots taken at an animal, and the time between first shot and last shot.  Audio was used in conjunction with the thermal video footage to determine which and how many shot/s impacted the animal. We used the GoPro audio when the audio on the Blackmagic recording was unclear or did not record. Where no audio recording was usable, no information on the number of shots or the time from first to last shot could be collected. Experienced personnel (with > 50 hours experience logging thermal-imaging surveys) reviewed and logged the thermal footage. Two experienced personnel reviewed footage for both pigs and deer to reduce any bias and to ensure accuracy.