Every time I watch the Land Before Time 7 I see that whenever Sierra and Rinkus took off their wing membranes were transparent, but when they landed the membranes were opaque. Also, when Pterano is on the ground the one side of the membrane is orange, while the back of the membrane is a brownish color, and when Pterano is flying his wings are see-through. I find it quite odd because, aren't pterosaur's wing membranes suppose to be opaqe?