This one was interesting. Was sitting outside, and a seagull landed on a post about ten feet away from me - luckily I was drawing leaves at the time, and I had about ten seconds to capture this before he figured out what I was and flew off - I'd have liked to get a full-body portrait, but seagulls aren't known for sitting still very often.
Not bad for a ten second sketch - I'd loved to have had ten minutes.s