The tiger bush, the primary habitat of the giraffe, is facing severe soil degradation due to arid climate and increased human activity. This study aims to assess changes in different land cover units and the extent of forest cover degradation in the core giraffe habitat. To this end, Landsat images from 1990, 2006, and 2022 were downloaded using USGS and processed with ENVI 5.1 software. The results reveal that the landscapes of the giraffe zone are predominantly dominated by cultivated areas. The expansion of cultivated areas has contributed to the degradation of tiger bush and shrub steppes, which have seen their areas reduced from 1990 to 2022. The transition matrix showed a 73.21% change in regular tiger bush between 1990 and 2022. The degrading dynamics of forest cover caused by the overexploitation of natural resources should in the long-term lead to the complete anthropization of the landscape.

The determination of the impact of the Natural Regeneration Assisted on the avifauna, which is very good indicating of transformation of the landscapes, requires proceeding to its inventory. The present study carried out in the village of Dan Saga in the months from September 2014 and 2015 which a site par excellence of the RNA were for the first time the object of an inventory in order to see the contribution of the Natural Regeneration Assisted on the return of the avifauna. In this direction it was preceded, with an inventory of the avian biodiversity by the combination of the methods of line and not transects. Thus, eight transects were traversed during the two programs of census. It comes out from this study that the village of Dan Saga has a good avian diversity, represented by 29 species of which most frequently observed are pass griseus, Bubalornis albirostris and Petronia dentata. These species set out again in 20 Families. The Kilometric Index of Abundance (KIA) were much more important on Transect of North-West (TNO) and Transect of North (TN) where Faidherbia albida are important; on the other hand Transect of East (TE) presents the weakest IKA. Finally we can say that assisted natural regeneration supports the maintenance and the blooming of avian fauna.