Possible Clues:

• Gull's relative
• Gull-like seabird
• Sort of seabird
• Fork-tailed gull-like bird
• Rent out this gull
• Might that be Arctic roll, did you say?
• One bird or another with bit missing
• Fork-tailed relative of the gull
• Bald eagle's sea cousin
• As this seabird is back there at sea