Description

I was out riding my bike this morning when I noticed a man looking up. I stopped because I thought it might be a cool bird, but it was this. Tree for scale/distance relativity. The man said it was much lower before I got there. Just hovering for at least 5 minutes. I eventually continued on but I saw him before I left the park and he said it eventually "poofed" away (whatever that means).
Can anyone identify it?