This study investigates whether evolutionary threat related stimuli (threatening animals) cause an attentional bias in the change detection process. The results of Experiment I showed that observers detected changes to threatening animal category more rapidly than changes to non-threatening animal and other non-threatening object categories in the flicker task. Moreover threatening animal category causes this change detection superiority although it is not visually the most salient category in any trial. It was also found that this change detection superiority occurs because threatening animals capture rather than hold observers attention in the flicker task. The findings of Experiment 2 indicated that observers detect changes to threatening animals faster since they typically made their first fixations to threatening animals more rapidly than other categories.