If you watch some documentaries on rare insects or birds, there are so few of them yet the range of their habitats is huge (or at least it seems there is no limit). Given that, how do these creatures find their species for mating? I mean, isn’t it super rare to accidentally encounter one of their species despite the helps of pheromones or sounds?
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Birds have good vision and can fly. Insects can fly, see ultraviolet and use chemicals to find each other. That helps even endangered species.
I remember thinking that the reason why earth worms are still hermophrodites is because they can’t see, must tunnle through moist soil to live and have no limbs. Everyone wearing both hats makes reproduction easier with that life style. Good thing for the worms that they are super common.
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