I found this one on (where else) the internet. I've made traps similar to this for catching flies since I was a kid (flies make great chicken feed, and they're free).

I haven't tried this for mosquitos, but it looks like it should work.



HOMEMADE MOSQUITO TRAP:
Items needed:

1 cup of water
1/4 cup of brown sugar
1 gram of yeast
1 2-liter bottle

HOW:

1. Cut the plastic bottle in half.

2. Mix brown sugar with hot water. Let cool. When cold, pour in the bottom half of the bottle.

3. Add the yeast. No need to mix. It creates carbon dioxide, which attracts mosquitoes.

4. Place the funnel part, upside down, into the other half of the bottle, taping them together if desired.

5. Wrap the bottle with something black, leaving the top uncovered, and place it outside in an area away from your normal gathering area. (Mosquitoes are also drawn to the color black.)

Change the solution every 2 weeks for continuous control.

Onward and upward,
airforce

Do you do anything different to make it a flea trap?

A flea trap is something else I've never tried to make. It always seemed to me that cats and dogs wee already pretty good flea traps. But I do remember somebody making a flea trap with a pan filled with water and a little dish soap, under some sort of a lamp for heat. Let me see if I can find something.

UPDATE: Well, that was quick. Here\'s five different flea traps , all of them using some variation of that soapy water idea.

Onward and upward,
airforce

AF, you are correct with the dish soap and light. You'll be there a while with it, but it does work.

It looks like it should. I've personally never tried it or the mosquito trap, but they look like they ought to work.

Onward and upward,
airforce

If anyone is wondering how to make a fly trap, here are three examples .

The ones I made looked most like the first one, except I used old window screen material for the funnel. I think this gets the bait odor out more. An old pickle jar works well for the container. And I threw some old meat in the water at the bottom. (Meat from a skunk carcass worked well, and I usually had plenty of it around, but I don't think it really matters much).

Put the trap a fair distance away from the porch, near a trash can or compost pile, wherever flies congregate. If you have a barn, it wouldn't hurt to have one in there as well.

If you raise chickens, a couple of these traps can help with the feed bill.

Onward and upward,
airforce

I like fly paper for flies that get in the house.

Yep. That fly swatter game gets old, quick.

I should point out that none of these traps will eradicate the problem, only help to control it. We don't have to worry about flies or mosquitoes suddenly going extinct.

Onward and upward,
airforce