Natures Good Guys – Fly Exterminators (50000)
$71.99








Price: $71.99
(as of Nov 01, 2025 22:26:23 UTC – Details)
How to Release Fly Parasites:
To release, simply sprinkle Fly Parasites near manure and then lightly cover to protect from birds or hang release bags off the ground to protect from birds and rodents out of direct sunlight. Height is not critical. Fly Parasites will self-distribute up to 100 yards. In early spring, Fly Parasites should be released at first sight of flies.
Top release sites include; barns, stables, kennels, manure/urine-soaked bedding, chicken coops, on feedlots, and wherever straw bedding is provided for animals.
Other potential fly-breeding areas include; compost piles, garbage cans, septic tanks, and near water sources, but not directly in.
*Release Fly Exterminators monthly during the warm months.
*Every order includes Hatching Release Bags to keep fly Exterminators SAFE and out of reach of birds and rodents.
Fly Parasites feed on Horse Fly, House Fly, and Filth Fly. These tiny flying insects are completely biteless, stingless, and do not bother humans or animals. Fly Parasites go virtually unnoticed, only flying inches off the ground. This package contains Fly Parasites in a parasitized pupae stage and will be hatching or close to hatching upon receival.
Eggs can take 7-14 days to hatch at 70 DF or higher
Release Pouches Included!
Harmless to humans, pets, birds, beneficial insects
Release monthly during the warm weather months

Mom33 –
Nature vs nature and these little buggers win!
Flies on a farm are bad and hard to manage most of the time. These little buggers definitely cut the fly reproduction drastically. I put them in all enclosers as soon as it gets warm outside and they go to work. They interrupt the life cycle of the larva so they never turn into the turd spreading tiny winged vultures of the insect world. Make sure you buy enough based off your animal count.
Shawna Gonzalez –
Don’t buy!
I bought these in hopes they would really work. I was fooled. These little black shells come in wood shavings. I let them do thier job. We’ll I thought, I had more flies than before and even on the bug bags. I write the company and they tell me I need to buy more and the bugs are so small a human eye can’t see them, lol nice one. Don’t be fooled.
Timothy &Kathy –
Great product
We have over 30 donkey and using this product for the first time this year we hardly have any flies .
Nickey –
Hatched but didnât get rid of flies
After reading reviews I was nervous that they werenât going to hatch..good news is they did hatchâ¦bad news they didnât get rid of any flies in my yardâ¦there are still so many flies around my chicken coop it didnât do anything or rid us of them at all. Huge let down & waste of money.
Little Longhorn Ranch –
Easy and effective!
Amazed at how easy this product is to use and how well it took care of my fly problem. I have been using all summer and fall. My 4 longhorn and one donkey used to be covered with flies until I started using these tiny creatures. The white donkey looked like he was wearing a black vest. After the first use, the flies were gone in just a couple days. The pictures of Jewels and her mother, Diamond, weâre taken in the height of fly season. No flies around.
Melaney –
Waste of money
I would give this 0 stars if I could. Nothing has hatched, I have followed instructions completely. Complete waste of money…. waiting to see if i get my money back…
H W –
Did not work for me
Weeks later larvae still larvae – flies still abundant. Not worth the money.