I feel that I must appeal to banjovians (even though banjos don't appeal to me) to cease and desist from using either Hymalayan Mylars or the Common Haggis for Headskins. The reproduction rate of both these animals is very low due to their biology; they have two short and two long legs. Each. This enables them to move with great facility in their mountainous grazing areas, as the long legs are both ON ONE SIDE. As a result, there are clockwise and anti-clockwise variants of both species which means that half the specimens are unable to breed with each other, as they can only meet face to face (or the reverse) and fall over if they turn around.
You will never see these creatures in a zoo for the same reason. No-one can afford to make a concrete mountain big enough to stop the poor mites getting dizzy.