The problem will be when they are all headed for the exit at once..

In other words, 19k will be a tough bone..

I gotta be honest with you. I do not remember any of them. Only can imagine the shape of carbon or something. Octagon or something?
Don't laugh if this does not make any sense LOL

Wasp, bees, bio warfare.

Wasps are more aggressive (many wasps are predators, while bees are vegetarian). Wasp stings are generally more painful than bee stings.

However, bee stings are more likely to cause serious anaphylaxis and death in allergic individuals.

Geckos are moderately useful for keeping mosquitoes in check. Bats are better, but they prefer to feast on small flies (fruit flies etc), usually more numerous than mosquitoes. They are also a good indicator of clean air, since they can't survive in heavily polluted areas.

The best bio-weapon for mosquitoes are ladybirds (ladybugs) from what I've heard and read. They are relentless predators of anything that moves. They are already effective at the larval stage. Preferred food: aphids, but they do eat mosquitoes too.

The ideal solution would be some aquatic predator that could clear mosquitoes while they're aquatic larvae, but I don't know about any widely adopted specific solution. Frogs anyone?