At that time Alexis was drawing logos or art for products he advised or knew the founders of, including most notably Hipmunk. I’m not sure if Joel asked him to draw it, or he volunteered, but it happened and then early in my time at Fog Creek, Alexis and I were catching up about some other stuff and he told me that version of the kiwi was his.

logos aren't just trademarks, they are also themselves copyrighted, and if he never explicitly gave up the rights...

He'd have to care, which I can pretty much guarantee he doesn't.

Great bit of trivia. Thank you for sharing!