虽然总说不要用小动物代了，但看到一个蛙蛙的性食同类Sexual cannibalism，真的很本子！/10.1002/ece3.11576
蛙蛙啥都往嘴里吞，吃吃同类是很普遍，但一般都是蝌蚪互吃，或者大蛙吃小蛙，成年蛙之间还与性相关的同类相食确实好少。
相比于蜘蛛一类节肢动物，脊椎动物更复杂的行为让一切变得更本子了。从标题就开始meal or mate, 纸里提到如果雌性能够通过雄性的鸣叫声判断其质量，那么就有可能借此来决定对方是用于交配还是当作晚餐。许多物种的雌性偏好大体型雄性，于是通过鸣叫声，可以远距离检测到环境中的小体型个体，他们不适合交配但容易捕食。
作者采访里的用词更是，"There’s a very good opportunity that females can exploit their male counterparts, not only as breeding partners, but potentially as prey. It's risky for male frogs out there. They're calling their little hearts out to find a mate, but they just have to take on this extra risk of maybe being used as prey."
在求偶场拼尽全力炫耀，却从一开始就被判定为食物用了。