Playing or being agressive?

[frenky]

It sounds like your American green tree frogs are exhibiting some common dominance behavior. As Larry mentioned, this is quite normal among many frog species when they're determining hierarchy. Keep an eye on their health and behavior, especially their eating patterns and physical condition. If you notice any significant changes, like one frog becoming thinner or showing signs of stress, it might be time to consider separating them. It's great that you're observing their interactions closely – that's key to ensuring they both stay healthy and happy in their environment.
basketbros

[elly]

I don't know that frogs do dominance behaviors normally. (Not saying they don't, just that I don't know.) I suspect that it's more likely the female saw something moving and tried to eat it, even if that thing was a whole other frog. That just seems more reasonable considering what I've personally seen of frog behavior patterns. But who knows maybe ADF do have dominance based social behaviors that aren't male v male or disinterested female at mating time.