Let me know if you think there's anything to this... We have 8 related green trees held back from 2009 and every red/brown neonate had large diamonds on the back and every yellow one has small spikes that are basically just the border color rather than the large, black-edged, white diamonds on the reds (see photos below). I recently got a chance to see some 2008 holdbacks from the original parents and every one of them was the same way.

I've never read anything about this and even Maxwell's book doesn't mention it to my knowledge. More than seeing who has similar ones, I'm really curious to see if anyone has a yellow with diamonds or a red with the thin spikes. Is this a species-wide thing or what?