These are the critical "Jenga" block that is the keystone for all the food chain for all life on this planet.
Mosquitos feed the birds, the bats, fish, other insects which feed the next tier such as larger fish, birds of prey, raptors, owls, even mammals and larger predators and on and on until the pinnacle creatures; such as Mankind will suffer once the food chain is broken... all life will feel the loss.