The reason they all come from the same species is because they are. Lets say, you have a Pit bull and a Toy Poodle, well see, they are both Dog breeds aren't they? So since they are both dogs that the category they go into, but, if you go deeper into genetics and categorize the breeds, they are different, One (the pit bull) is a heavy duty large dog that falls into the aggressive breed (even though they aren't in my opinion) And the toy poodle, falls into a small show dog breed. Just because the spider feed off different things and are different colors, doesn't mean they aren't the same species. I mean there is the Camel Spider, that is it's name, yet, DNA and Genetics prove that it's more Scorpion then spider, it also doesn't have 8 legs, it has 10. Yet its name give your brain a different idea. I hope I could help. If i did, give me a heart, or brainlyest answer please :D
