Female wyverns spawn egg nests when they land. Alternatively you kill a female and the corpse will start spawning a nest and eggs after it touches the ground. It works the same way on other maps except for Scorched Earth and Ragnarok.

Thanks mate !

It doesn't need to be female wyverns actually. I can confirm that both normal and alpha male wyverns are able to lay eggs. I've noticed that higher lvl alpha wyverns are less likely to lay eggs after landing, but that might be a coincidence.

Yeah Panda is right i noticed that too