Lead wyverns out of trenches on mobile there is an over spawn on rag, so many spawn that nests can be filled and some wyverns don’t get to lay eggs. I like to lead them to a diplo or a bronto, but in reality you can lead them to rhinos and mammoths, I have noticed that rhinos entertain wyverns the most as they have literally had an entire 1 minute showdown with a max level lightning wyvern. Most creatures die with in the first few seconds to the wyvern, which is why I say go for rhinos, there is also the option of going to a cave next to the trench bridge. The bridge is a natural one and the cave is only accessible through a climbing creature or a medium to small flier. I can’t guarantee a wyvern won’t fit in there, but the entrance does seem a bit too small. This cave is large with no artifact, it has metal and salt, as well as obsidian and two entrances. The second entrance is quite close to the ground and it usually a wyvern sits outside, the cave is spacious so if the entrance isn’t enough to get the wyvern stuck you can build a gate trap.