Hi, Mary . . . umm, I mean Terry. This Aldabra tortoise living at Cleveland Metroparks Zoo arrived in 1955 and, since then, keepers assumed he was a she. Since these reptiles' reproductive organs are not usually visible, it took more than 50 years 'til they've got her gender lined up right, so he's now known as Terry instead .
This confusing situation got me thinking: with pets like fish, lizards, small mammals, or even stray cats, sometimes people assume a pet is one gender only to find out later she's something else entirely — that is if they ever find out for sure. I know I'm not the only one with a salamander named Sam (that could have properly been a Samuel or a Samantha) — so share your stories of pets with gender-specific names and unknown (or noncorresponding) genders in the comments below.
Source: Cleveland Metroparks Zoo