Do these fish eat mosquito larvae and what other ones.?

You might try guppies, gambusia or other livebearers. They have been introduced to rivers, lakes, streams in many parts of the world just for the purpose of mosquito control. They are tropicals so you will need to know your water temperature and speak to a local fish dealer about whether your outdoor conditions would suit these fish. They do love mosquito larvae! They are also inexpensive (as long as you avoid the ‘fancy’ guppies) and they also reproduce very readily so you could start with a small group and have several more as time goes on, without purchasing any more–as long as your area is not too cool. Guppies are pretty fish and I’ve often dreamed of having a guppy pond in my backyard. Good luck!