Dave, the also known by the less memorable moniker "specimen NGMC 91" was a juvenile dromaeosaur that became famous for his feathers. Or her feathers. I don't think we can tell. For a good while we didn't really know its exact place in the dromaeosaur family tree either, but now it seems we can at least agree that it was a subadult Sinornithosaurus.
I illustrated Dave with a protobeak, even though there seems to be no indication that such things existed in deinonychosauria. I think the feather covering should go further down the snout too.