Pigeon guillemots dig holes in cliffs for nest sites. They use their narrow beaks to pry out stones, and sharp toe nails to scrape. Cliff nests are placed in crevices or hollows where one or two greenish, dark spotted eggs are laid.

Pigeon Guillemots nest in cliff crevices, bluff holes, and under beach logs. People and pets pose a threat to guillemots in these areas during nesting. Climbing on cliffs can destroy nests. Even a walk on the beach with a dog can lead to problems for guillemots. Boats can also frighten guillemots from feeding areas.

• Do not climb bluffs. Your foot or hand may smash an egg or disturb a nest.
• Keep dogs and other pets under control and away from birds and nests.
• Avoid boating near sensitive nesting sites and feeding areas.
• Keep an undisturbed buffer of native plants on the edge of your waterfront bluff. A buffer helps prevent erosion and provides protection for nesting guillemots.