sometimes I suffer from “common species blindness”, ie when things are so common that I assume that they’re already on my life list when in reality they aren’t. Teddy bear cholla was one of those things for me, one of the most common and recognizable cacti in Arizona and a species I saw literally almost every day but I didn’t realize that I never photographed it until after living here for over a year.
I’m sure there are plenty of other ridiculous holes in my life list, but if I knew what they were then I’d be out trying to remedy them :)