Don't be too surprised if some insects come from your manure. Remember that many kinds of flies lay their eggs in manure. Beetles and other orders of insects also feed on or grow in manure. Keep a record of your dung jar on a sheet of paper. I placed it in a pint jar on some paper towel with just enough water to wet the towel.
Manure is green-black.
Manure is turning blacker. I would be delighted to receive an e-mail from you describing how you did this experiment and what happened. All good scientists report their results. I will publish the best reports on my web site. Click here to read the results of other people's dung jars.