The Death's Heads are growing fast

Only 3 of the Death's Head Hawkmoths hatched, but those are growing fast. We think they changed their skins last night as they are definitely getting bigger now. They've changed slightly as they have a dark stripe down their backs now and their tails are a little more curvy. We couldn't see the old skins anywhere, but they usually eat those anyway. They seemed to stop eating yesterday, which is usually a sign they are changing their skins. They are back to munching (and pooing) again this morning though!