So I was thinking of a scifi setting where life evolves on a planet orbiting a star that periodically (every couple decades) hits the planet with a hemisphere-sterilizing CME.
So the plants respond by going for the "fire ecology" strategy where they stick a bunch of hardy spores under the soil deep enough to survive it, and sprout in the wake of the surface getting blasted.
but animals can't do that, and they can't afford to stick in one location, either. No matter where on the planet your species lives, eventually you'll get unlucky and your hemisphere is the one that gets wiped.
so they have to go for heavy r-selection breeding strategies: breed fast and don't expect many of your offspring to survive. Run fast and spread faster. Then there'll be enough of your species to survive when half of them get hit by a CME event
like I imagine they'd very quickly learn to observe their sun to try to and predict them, but I imagine they wouldn't be able to nail it down to which exact hour it'll happen.
so the obvious solution would be that they would dig in. If you can build shelters deep enough to keep from glowing when you come out, you could go hide underground when the CME comes