I have had my beautiful Horsefield tortoise for 5 years now. He/she is around 5-6 years old. Recently my tortoise (named Sheldon) has started to mount items and make squeaking noises, I’m guessing these are mating habits. We have been told that Sheldon is male (of course you can’t tell at a young age however). I haven’t seen his genitalia while this behaviour is being shown. Can anyone help me identify if Sheldon is male or female?