Do any 2 animals regularly prey on each other?

There’s these two ancient species

I don’t know about the lion’s liver, but a polar bear’s liver is toxic to humans because of the massive quantities of vitamin A. However, I was under the impression that this was due to it being an acrtic creature rather than a predator

Snakes are snakes. When a mongoose sees a snake, he doesn’t say “Hmm, that coloration pattern is not the same as the previous snake that I ate. I wonder if this is a different species…” He says “Look, a snake!” Followed shortly thereafter by “Mushrooms, mushrooms!”

Polygoose might not care about coloration patterns, but I’m sure they care about size.

I’ve read that mongoose will avoid certain snakes as too dangerous, e.g., the black mamba.

I think what we’re talking about here is a form of biological competition, which according to the link is not a stable situation. Eventually one or both of the organism succumbs to the harmful effects, and stability is restored.

Still looking for a proper cite. I see anecdotes about male elephants killing lions, and elephants used for hunting lions by people.

This is an extraordinary bit of video though;lions taking down an adult elephant.

Just for the record, I’m not going to stand by the original claim. I certainly heard it, but you’uns are right not to just take my word on it, as I don’t have a cite.

I’ve heard and read the anecdote more than once. But anecdotes don’t equal fact. I’ve heard several times, and can probably find cites for, the ‘crocodile bird’ that enters the open mouth of a croc to eat parasites. Recently I saw an article listing that as non-factual. Searching for ‘elephants hunting lions’ gives me tons of hits for ‘lions hunting elephants’. Not much help.

I’ll be damned. Never knew there was a scud other than a missile.

Lousy sounding name, though. Whoever named 'em must’ve not liked 'em.

“Scud.”

Heh.