Hello, I am pretty sure that you are talking about Springtails! They are basically in all worm farms and are harmless. You can just ignore them they will cause no trouble whatsoever for your worms or your worm farm. Have a look at the link below and you will find some more information about springtails and other worm farm inhabitants that you might find inside your bin sooner or later! Most of them are actually helping to break down the organic waste. Kind regards Stephan Here is a link that might be useful: worm farm inhabitants

When heating occurs in a home bin you can just about count on the fact that it is pocket fed. Heat requires mass and some insulation, both of which are better supplied by massing food in one spot down in the bedding than when food is spread in a thin layer over the surface of the bin contents then covered with an equally thin layer of new bedding, as is done in top-feeding. If heating is a regular problem for you then consider the top-feeding method. As for cocoons, these little structures and the developing young inside are barely impacted by the heating in a large backyard compost pile, let alone the lower heat achieved in a low-mass worm bin. Cocoons can survive drying; heating (to temps in excess of 115 degrees F); long-term submergence (more than two years); freezing for extended periods; and ingestion by animals, even ruminant animals, like cows and goats (provided they make it past the teeth). In response to stressful conditions outside the young within the cocoon slow development, completing developmnent when exposed to conditions more favorable to worm activity. You can feel confidently that the heat in your bins has had no measurable impact on your cocoons. Kelly S

Your mite could well be the maggot of the Sciarid Fly. Lots of minute maggots (legless with black heads)which develop into a small fly or gnat (at first glance looks like a small flying ant). The maggot is a mennace because they feed on the fine roots of plants. The fly (or gnat) lays eggs in compost rich in manure that has not reached high heats. It also thrives in an acid environment so use some doomite lime in compost.

Black Soldier Fly is my guess as well. These guys will heat up your compost pile pretty quickly. The only downside is the heat these guys generate can chase away your compost worms.