Possible Clues:

• Bird giving dirty look when love leaves to bounce back inside
• Nocturnal bird with a harsh cry
• Despite its name, its primary call is more of a whinny
• Flyer: 'Dog left on unstable slope'
• Bird beginning to hide in cover under loose stones?
• Predator known for its piercing call
• Bird of prey
• Fragments of rock, food left for bird
• Piercing cry that hurt head of little bird
• Nocturnal bird that woke up Vinny in "My Cousin Vinny"