Yellow-footed gull (Larus livens), eggs in nest on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Heermann's gull (Larus heermanni), egg clutch detail at breeding colony on Isla Rasa, Baja California, Mexico, North America

Moorhen's nest, with seven eggs laid, made with twigs among iris plants in a pond in Swinbrook, the Cotswolds, Oxfordshire, UK

Moorhen's nest, with seven eggs laid, made with twigs among iris plants in a pond in Swinbrook, the Cotswolds, Oxfordshire, UK

Moorhen's nest, with seven eggs laid, made with twigs among iris plants in a pond in Swinbrook, the Cotswolds, Oxfordshire, UK

Birds' eggs for sale, Gulang Island, Shandong, China, Asia

Cracked egg in nest

Coloured quail eggs in shell, Easter eggs, Germany, Europe

Coloured quail eggs in small bowls, Easter eggs, Germany, Europe

An egg with shell cracked on a white background

Red-Spotted Guard Crab (Trapezia tigrina) female with eggs, sheltered in a branchy coral, Mayotte