Help with my cat he's a serial killer?

Since the first day i got this demon he's been bringing home dead birds, since day one. This thing learned to kill before it learned to meow. It would always kill sparrows, and pigeons.. but today I saw it kill a god damn seagull.. It was ruthless I always thought my cat was a pussy but this proved me wrong. He kills it and he brings it home.. the seagull is twice it's size. What do I do with this seagull, It's like my cats been bringing me all this food so I can eat it as a gift or something..