I've never been in a situation like that so I can't say for sure. I would like to think that I wouldn't interfere with nature but mostly likely, I'd try to have the best of both worlds. That is, hurriedly snap off a few pics and then try to help the poor thing (referring to the squirrel scenario). For something like butterflies and dragonflies, I probably wouldn't help. They're bugs, and I wouldn't particularly care (as bad as that might sound). Lol, and I DEFINITELY wouldn't get inbetween a lion/bear and zebra/salmon.

(without the cigarette of course. )