Invisible Sleuthwings are Dragon-Birds who have the power to vanish into thin air. they are seen hanging around Sleuthwing Valley of Shipwreck Island or the Sky Marshes of Angry Birds Island. they can shed their scales off and disappear, because their under-body is Invisible, and even it's Organs are completely invisible!
- Colors: Whitish Gray, Transparent
- Poison: None
- Radar: Yes
- Hunting Ability: Deadly and Silent
- Fear & Fighting Factor: Don't fight this Dragon, and don't approach it