Possible Clues:

• Small gull
• Small pearl-grey gull
• Arctic gull with yellow bill and black legs
• Bird in pool dropping back — one having wash
• Sound of cat gathering in the end bird
• Oceanic gull
• How Parnell might have roused his bird, only to gull her
• Spooner's amusing waffle, say, identifying seabird?
• The name of this gull is an imitation of its cry
• Tailless hawk that's last one to excite gull