Do you suffer from a pesky local mosquito population? Granted, it’s less of an issue in the northern hemisphere at the moment, but if you dread the coming of spring due to an unreasonable quantity of mosquito bites, here’s a solution for you: set up an outdoor tank or pond with a few gambusia fish, also known as mosquitofish. Read more here:
“Many sources suggest combating mosquitoes that lay their eggs in ornamental ponds by introducing a few predator fish, usually gambusia. It certainly works, but around here we have taken this a step further. We set up an outdoor fish tank on purpose to attract mosquitoes, the eggs and larvae of which will serve as a feast for the fish. The local population of mosquitoes is thus reduced.”
Domestic Felicity 
Unfortunately, these fish are considered an invasive species in parts of the United States, so some of us would need to check with our local Fish and Game Departments. However, another solution would be Sweet Flag. have this in our pond, and it does control the mosquito population. Just plant it and forget it – my favorite sort of gardening! We have a dirt pond, and it did not spread, but you could put it in a pot and sit it in a lined pond. You can pull a few leaves and lay them in a bird bath and they will keep away the mosquitos there, and not harm the birds.
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That makes sense; in Israel there are so few natural bodies of water that it is of no real concern.
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