参考资料：
1、Phylogenetically diverse diets favor more complex venoms in North American pit vipers, PNAS (2021)
2、Fangs for the Memories? A Survey of Pain in Snakebite Patients Does Not Support a Strong Role for Defense in the Evolution of Snake Venom Composition. Toxins （2020）
作者有话说：这是吃货蛇的进化之路第2篇，第1篇的链接点击这里：
