I think these are the black solder fly.. I would love to have some.. We had them take over our un maintained compost one year, forever ago, when I had no idea what they were.. SO, one day it started to rain, I had to put up a huge tarp over our shop, I climbed up the 6 foot wall to attach, no shoes on, of course,.. Jumped down to find my shoes, in the dark with the rain coming down.. Could not find my shoe, so off I go to dump the container.. ON MY WAY, those gross, creepy things, literally came alive out from the compost and were slowly moving on the ground, up the walls, in the trees, up my legs.. YES, yuck. Totally freaked me out.. So I stopped doing compost.. but now that I have chickens & ducks, I know to just say the word "treat" or "bug" & they come running.. & they eat fly larva.. So if you have extra will you save me some.?
"Build it, and they will come."
Saw that in a movie once! (Field of Dreams).![]()
@City farm I can give you some. They are just starting to produce well now that it's cooled down some. @cyborg is right, if you build a something to house them with appropriate media to grow the larvae the BSF females will seek it out and lay their eggs in it so their offspring can grow there. They will be able to smell the media. The media can be kitchen scraps, old meat, wet yard waste, left over fermented feed, grass clippings, coffee grounds, soaked alfalfa pellets, etc. There are as many types of containers you can make as there are people, and there is at least one you can buy that is ready to use but it's too expensive for my budget. All have a way for the mature larvae to leave the wet/damp media in search of a dry place to pupate and they climb to do this so if you incorporate a ramp that ends in a container to collect them they self harvest at maturity. Here are a few of examples.

Below is the one you can buy, it's called a bio-pod
