In 2024, eastern garter snakes passed a scent-based self-recognition test: 24 snakes investigated their own altered scent, suggesting self-recognition

Recent studies reveal that eastern garter snakes exhibit self-recognition through scent detection rather than through mirrors. This intriguing behavior indicates that social dynamics could influence cognitive development in reptiles. Historically, self-awareness was thought to be exclusive to mammals and birds. These findings encourage a reconsideration of the cognitive abilities present in reptiles, opening a new chapter in our understanding of animal intelligence.