Once summoned, Spirit terrorbirds will disappear after 36 minutes, dropping all of their inventory. Players will be alerted when one minute remains, then when 30 seconds remain before the Spirit terrorbird will disappear. A Spirit terrorbird can hold up to 600,000 coins in items, none of which can be worth more than 50,000 coins, allowing it to hold 150,000 more coins in items than a bull ant familiar.