Found in school by students; very small, very fast. Spun silk inside a tupperware container and hung from the lid. I've looked and can't find anything to match. I actually thought it was an ant at first (a wonderful sign of spring). Male, right? It is still winter here, below freezing outside and snowing, so I released it back inside the school. Thank you. My classes are diligent in finding us bugs, so I would like to be able to tell them what this is and a bit of it's natural history. Thank you.