Does m osquitoes die after they bite?

No. The females bite you to get blood so they can have their young. Males eat only nectar.

They don't actually bite, they have a complex feeding tube that cuts and then inserts into animal tissue to suck up blood. The blood goes to the stomach, which is in the abdomen. The blood is transformed into free amino acids. These acids are used to make yolks for the larvaes. Go to the links: