Possible Clues:

• May get gulled into being another sort of bird
• 'Great' arctic seabird
• A country's upset by predatory bird
• Large relative of the gull
• Divers coming up, one's a seabird
• Being so gullible, ask about you
• Aggressive seabird forces others back
• It flies with the sound of a spike
• One bird going forwards or a number going back
• Bird or birds rising