A.G.
I would ask a man to take care of it.
Sorry if that's not ''feminist"....the best thing would be to step on its neck quickly and with force but i wouldn't be able to hear its little bones cracking without nightmares. This actually happened to me a few times, one time was a baby bird nest that my cat "found", it was awful. My Friend took them away and took care of it. I never asked questions. The other time a bird flew right into my house and died instantly and i had my brother take care of it.