My suppliers sell all these too! I want to know too! Surely if they sell them in the same section they should be fine its just them eri silks look dangerous haha
The first ones are regular silkworms. The second one are commonly called zebra silkworms. I don't know what the third ones are called. I breed regular and zebra silkworms for my chameleons.
I asked about Eri silkworms a few weeks ago. They are ok to feed (as I was told in my thread) but only if you feed them the special food. They don't eat Mulberry like normal silks, they eat Privet, which is not good for chams. I didn't bother ordering any in the end, didn't think it was worth the risk.
As long as the eri silkworms are fed a chow (which should be available from the supplier) they are safe to feed.
The black silkworms are different than zebra silkworms. They have much thicker banding and the sexes are not visually different. They are the same species as the 'regular' silkworms.