Automeris io is probably the most commonly available Automeris species. Usually they are very easy to breed. This however depends greatly of the food plant you're going to offer them. If you have the irresistible urge to make your life complicated then you really should give them Prunus serotina. They will eat it, but growth is extremely slow and caterpillars remain smaller then usual. That is, if they don't get sick and die, because on Prunus serotina the animals are very weak and susceptible for diseases. There are definitely better food plants to breed them on, like Salix or Rubus.
|Automeris io final instar on Prunus serotina|
|Automeris io L5 on Prunus serotina|
|Automeris io L4 on Prunus serotina|
|Automeris io L3 on Prunus serotina|