The TAAC configuration can be particularly useful when detection
probability is low due to dense vegetation, avoidance behavior, or low
density. Thermal imaging is a tool that can provide a high level of
confidence in aerial culling programs, especially those that are focused
on eradication.
We make several recommendations for any jurisdiction considering
thermal-assisted aerial culling. The selection of thermal sensor is
important (see Cox et al. 2021); and a high-resolution imager with a
minimum of 30 Hz viewing rate is essential. A large sensor size
increases swath width and depth, allowing for more area to be surveyed
quickly. Transitioning to thermal imagery will be more productive if the
shooter has experience with the thermal equipment in ground-shooting
operations. Given the extent of communication between crew in a
thermal-assisted program, and particularly between the thermal operator
and the pilot, who are on diagonally opposite sides of the helicopter,
clear terminology and standard phraseology should be established prior
to any program to avoid confusion (this approach would also be
beneficial for visual aerial shooting programs). Team communication
evolves most efficiently when confronted with a real shooting situation.
This enables the crew to learn how to work with each other and to work
out their strategies. During searches themselves, the two observers
equipped with thermal imaging (operator and shooter) can identify
animals quickly, permitting a high and steady approach (e.g., 90 m and
30-40 knots) that provides more opportunities for an effective
engagement (B. Florence, 2021, personal observation, 22 July).