Biodiversity conservation in Côte d'Ivoire is a major issue, given its importance, diversity and the particularity of its flora and fauna. However, this biological diversity is severely threatened by a number of factors, including deforestation, poaching and climate change. The example of the Yaya classified forest in south-eastern Côte d'Ivoire is a good illustration of this situation. Remote sensing data were used to analyze changes in forest cover in 1986, 2000 and 2018, revealing that the forest occupied 22236.8 ha (in 1986), 19179.61 ha (in 2000) and 19055.44 ha (in 2018) respectively, i.e. a decline of -0.48 per year.