i tried cecropia but the caterpillers all died one by one. tricky species that,you cant rear indoors as it needs constant fresh air. very beautiful, but with the atlas moth, one for the experienced breeder
the indian moon moth, luna moth, tree of heaven moth, and chinese oak silkmoth that i kept last year were all really straight forward though and fun to keep. everyone loves the moths, even non bug people as they are so big/spectacular. other easy species are the british emporer moth and bullseye moth and theres some others as well.
only real troble is keeping up with getting fresh leaves every day, cleaning out frass every day, and pairing the adults. some pair easily like the chinese oaks and luna, but i couldnt get the indian moon moths to pair unfortunately. also if you get them to mate you have to force yourself to cull most of the eggs/larvae and just rear a few as they eat so much and get diseases if too crowded
if anyone wants stock of these in the uk, a good place is midlands moths which is where i got mine.
above
some cages with chinese oak silk moth larvae. the homemade box has greenhouse glass for front which slides sideways