Colobopsis explodens use a strategy called autothysis (Greek for "self-sacrifice"), which only makes sense from a Darwinian perspective if the group being protected is very closely related, as in eusocial insects (the other example of autothysis is in eusocial termites, Globitermes sulphureus)
TIL I learned about Colobopis explodens (yes, that’s really their name) ants
If attacked, they bite the predator, angle their bottoms towards it, and explode. The exploding ant dies, but releases a toxic, spicy-scented yellow substance which also kills the predator, protecting the colony
