With a natural habitat map unchanged since 2003, the announce in 2015 of future GPS-collars availability for research teams to implement habitat utilization on Pyrenean chamois (Rupicapra rupicapra pyrenaica) and Capercaillie (Tetrao urogallus aquitanicus) pointed out the need of its evaluation and update.

The first work of evaluation conducted in late 2015 concluded for an update experimenting a standardized methodology.

Fieldwork ran on two campaigns in spring-summer 2016 and 2017 producing data covering the third of the reserve expanse, the rest was interpreted through an equivalence relation between physical factors and habitat value to complete the map.

As the first equipped animals were captured and released during summer 2017, the map and its database were operational in winter 2017.