The census was conducted three times (27 October, 7 and 28 December) with the aid of binoculars, telescopes and cameras equipped with telephoto lenses. In the first two censuses, the method of simultaneous observation from vantage points was used, with a total of 13 stations located in the core area between the municipalities of Pozzomaggiore, Bosa and Alghero for a continuous period of three hours (9.30-12.30). In the census of 28 December, the transept method was used in the nesting areas of the Bosano and in the habitual dormitories of the species (Monte Minerva, Cossoine and Pozzomaggiore) using 4 motorized teams composed of expert griffon vulture monitors for a continuous time of 4 and a half hours (8.00/12.30).

From the data collected, the estimate of the numerical consistency of the Griffon Vulture in Sardinia corresponds to an ascertained minimum of 230 individuals and a maximum that can be estimated in 250 individuals.

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