Ken-ichi Ueda is an amateur at many things, but one of the things he is most amateur about is natural history. He is a lead designer and developer of iNaturalist.
He has bruised a rib after losing control of a rock he turned in search of salamanders, and was limping for months last year due to an injury sustained while chasing a Snowy Owl. He has been bitten and/or defecated upon by almost every species of snake in the Bay Area, and knows from first-hand experience that the inside of carnivorous plants often smell like carnivorous animal poop.
If you see someone with a bad case of poison oak reading a field guide on the train, it's probably him.