You've touched on a pet subject of mine. I went through all of this some years ago and have managed to greatly reduce mosquitos at my place. There are thousands of species of them and they have a lot of different requirements. Some will breed in stagnant water, some only in clear water, others on wet ground.

They seem to be able to tell if fish inhabit a body of water and tend to avoid it for laying eggs. They find more suitable water and manage to keep up their population levels.

They always find something suitable. So I provide water containers for them to breed in. When the larvae have developed to a reasonable size the water is tipped into my fish ponds. When setting up the water containers again I never use water from any of the fish ponds, the mosquitos will avoid it.

New mosquitos will always "blow in", and some will manage to breed away from my water containers. However, generally their numbers are insignificant.

Thanks for your replies--:)

My frogs seem to do a great job.

Studies have shown that frogs aren't good at catching flying insects, except when they're both attracted to lights at night. The insects become confused, are more readily seen and so are easier to catch. Otherwise, they get annoyed by the mosquitos just like us.

I was always getting mosquito issues in the yard in the summer. So I did several of the "traps" of leaving out a small bucket of water with some leaves in it... and then leave in a BT mosquito dunk. You can get these BT dunks or pellets at HD or Lowes.

This will attract the females to lay their eggs... but they won't be able to develop and turn into adults. It's not the most satisfying trap since you aren't seeing a bunch of dead mosquitoes.... But I will say it really did help in my yard this year.

So why not have a very small stagnant area on the corener of your pond where mosquiotes lay that fish can get to like mosquito fish and guppies?