TIL People sometimes resort to amputating limbs to prevent the spread of infection. Woodworm ants, specifically C. floridanus, have also been observed to do this. They will gnaw off an injured leg of a fellow ant in order to save the other ant's life.

https://www.cell.com/current-biology/fulltext/S0960-9822(24)00805-4#%20
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gx352a/til_people_sometimes_resort_to_amputating_limbs/