Scale affects the understanding of biases on the spatial knowledge of Atlantic Forest primates

•Spatial knowledge of Atlantic Forest primates has biases that vary according to the study scale and grid cell resolution;•In broad-scale perspectives (regional and global) the primate’s spatial knowledge is unbiased;•At narrow-scale perspectives, the knowledge may have bias, depending on grid cell resolution;•The central region of the Atlantic Forest is well sampled;•The São Francisco region and ecotone zones need to be further sampled.