[ID: A picture of gold, black, yellow, and cream colored dragons in profile facing left. Behind them is a grey background with purple rectangles to frame the dragons. The dragons have some bird-like features like beaks and partially feathered wings and bodies. They have long quills on their backs and a stinger at the end of arow tipped tails.

The picture contains two dragons, one larger dragon standing on four legs with its wings partially outstretched and one smaller dragon standing on two legs with its wings partially outstretched. The smaller dragon has a bright blue throat sack with purple and pale blue markings that resemble an eye from the side. /End ID]

Full body designs for Musa Musa and her clutch brother Mune demonstrating the differences between male and female riding wyverns. Hens are quadrupedal and much larger than the cocks. The hens are the ones that are ridable. Depending on saddle style and size of rider the poisonous quills on the hen’s back may be clipped.

The cocks are small and bipedal. Instead of being mounts like the hens, they are instead used similar to hunting dogs or falcons. Chasing large prey back towards their owners to kill or catching/killing/retrieving smaller prey. Wyvern cocks are small enough and light enough to ride on the back of their master. Their throat sack can be deflated into a smaller dark globe like the females when not displaying.

Both cocks and hens have hands on their first set of legs that have opposable thumbs. Riding wyvern pens need special locks to keep the animals from letting themselves out. Feed bins/rooms similarly need special locks to prevent the animals from opening them.

The quills, tail stinger, wing claws, and fangs of riding wyverns contain venom/poison used in self defense from their predators or to take down prey. Riding wyverns can also spit gouts of boiling venom by mixing chemicals in their throat sac.