April 6 there was the kit at the same den. There are a number of dens in the area, and the birth den is a short distance away, and I never saw them there, but footprints and other signs showed it was active earlier in the year.
Mom was nowhere to be seen, and the kit moved around the den area.
He was definitely getting adventurous, jumping at flying leaves and capturing them. I watched for a while, but the mother never showed up.