The Wyvern Clan's rookery was located in a cavern underneath Castle Wyvern. It was dark, dank, and predated Castle Wyvern. After the castle was removed, it was reduced to a rocky ditch in the hillside. The eggs laid there belonged to the entire clan. In 994, the Trio and Bronx were sent to the rookery as a form of punishment for fighting with some human peasants. Fortunately for them, this spared their lives during the Wyvern Massacre. At the time, there were 36 eggs in their rookery.