What is the name of this pattern?

Very new to fly fishing here. I got two of these flies as part of my “starting set”- I’ve been using them to practice casting because they’re very visible and float over snags. I think they’re dry flies, but when pulled through the water they seem to “dive” below just slightly, which may be indicative of a different type. Just today I was casting one out over still water with clear signs of fish activity and retrieving it almost like a tiny jerkbait (tug, long pause, then tug again, so that it looks like an injured thing stuck at the top of the water), and while I wasn’t able to set the hook a fish did bite it, which marks my first “contact” so far with a fly rod.