Because of their great longevity, dragons frequently outlive their human partners. When this happens they may take another companion (often a relative of their lost partner), or fall into depression. If they do not care to take new companions they are often sent to live in breeding grounds, providing a comfortable, albeit mundane existence. Some dragon breeds are shown with the ability to breathe fire, or "spit" acidic venom, traits that are prized in countries where dragons are primarily thought of as military tools. The Chinese Celestial breed has a unique trait called the Divine Wind, a roar that can shatter wood, crack stone and cause hemorrhages at a short range. Other breeds throughout the series's world have a variety of unique traits such as the ability to make sharp turns (British Anglewing), the ability to ingest and spew large quantities of water (Japanese Siu Riu), or the ability to see clearly at night (French Fleur-de-Nuit).