Bat Training

[Roger W]

Brandts/Whiskered. Isn't the only way to tell them apart to look at the shape of their willies? And if they are female, you won't stand a chance. Which begs the question, how do the male bats know if they've paired up with the right species?

Smell, maybe?

Somewhat off-topic, but I discovered years ago when I did my MSc that certain species of slug can only be told apart by the human investigator by examination of their private parts - and you had to dissect the poor little things to do that!  How do they tell who or what they are mating with?  Or maybe they don't care?