Now, I know this chironomid midge looks like a well-trained pet since it is posing nicely and waving amicably to the camera...
I brought home some sand and such from the bottom of the spring and placed this "stuff" in an aquarium for observation. Soon some midge pupae began to hatch.
This photo shows a pupa a second before the midge began to emerge.
Here is a photo of a midge larva with a sand-tube in the background.
That's alot of gluing sand particles together with salivary secretions.
Here are a few photos of midge larvae building their tubes with grains of sand and other particles that they gather from their aquatic environment.
I gather these particular midge larvae feed on detritus ... I've seen them act like they are feeding on leaf fragments as in the picture below.
Here are a few more tubes that do the same.
There is one slight little problem...
By the way, the scuds are still very active in the sand-spring so I suspect they'll be up next on Nature Posts.