Wyvern Egg

Eggs of the four wyvern types

Wyvern Eggs are found in ARK: Survival Evolved and ARK: Survival Ascended and first arrived with Scorched Earth. Beyond that map the ARK Wiki places them on Fjordur, Lost Island, Ragnarok and Valguero, and its infobox adds Astraeos. There are four kinds, one per element, and each hatches into the matching Fire, Lightning, Poison or Ice Wyvern. The description reads: "Tremendously nourishing by itself, this egg provides extraordinary nutritional value in many cooking recipes."

Eating, kibble and weight

An egg can be eaten, or turned into Extraordinary Kibble. That kibble tames creatures such as the Yutyrannus, Griffin, Megalania, Thylacoleo, Rock Elemental and Cryolophosaurus, plus anything that eats Basic, Simple, Regular, Superior or Exceptional Kibble. Each egg weighs 50 and, per the wiki, does not stack (stack size 1). It spoils after 691200 seconds, which is 192 hours or 8 days.

Hatching a wyvern

An egg needs between 80 and 90 °C (176 to 194 °F) to hatch; outside that range it starts losing health. Hatching takes 4h 59m 58.561s, and an Egg Incubator set to the best temperature can cut that by up to 20%. Both parents must share an element, for example two Poison Wyverns, and a female needs 18h to 2d before she can lay again.

Where wild eggs are found

• Scorched Earth: nests sit in hollows along the walls of The World Scar, close to the blue and red obelisks.
• Ragnarok: the Wyvern Cave, and the Dragonmalte Trench between Murdersnow and the northern Highlands. Ice Wyvern eggs are not in the trench; look in Murdersnow near where Ice Wyverns spawn.
• Valguero: Ice eggs in the Great Trench and Fire eggs in the cave next to it.
• Fjordur: each element has its own realm. Lightning eggs are in Asgard, Ice in Jotunheim, Poison in Vannaheim and Fire in Balheimr at Midgard.

Taking an egg safely

Picking up an egg while wild Wyverns are nearby turns them hostile. The ARK Wiki suggests Gas Masks against Poison Wyverns, and notes that a Net Projectile from a Harpoon Launcher can hold a chasing wyvern in place for 60 seconds.