How does it work?
The protocol is based on the implementation of a sampling plan consisting of line transects, preferably zig-zag transects to optimise the prospecting effort. The observation platform is composed of two observers and a navigator who ensures live data entry, embarked on board a high-wing aircraft equipped with bubble windows.
The method used by this protocol is called line transect distance sampling and makes it possible to produce relative densities by correcting biases linked to the observation conditions (but potentially linked to biases in detection by the observer or the availability of the animal on the surface). The platform can be doubled by two additional observers, thus correcting some of these biases and refining the abundance estimates produced.