Birds are famous for laying eggs. The size, shape, and color of bird eggs vary greatly between species.
Most reptiles lay eggs, including snakes, turtles, and lizards. Some reptiles, such as snakes and lizards, can produce live young, but the vast majority reproduce by laying eggs.
The majority of fish species lay eggs. Fish eggs are frequently laid in water and can have a variety of morphologies such as sticky coatings or protective casings.
Frogs, toads, and salamanders often deposit their eggs in water. Amphibian eggs are typically placed in clusters with jelly-like coverings.
Eggs are laid by insects such as beetles, butterflies, and ants. Insect eggs can have a variety of morphologies and are frequently found in specific areas, such as on leaves or in soil.
Mollusks such as snails and slugs lay eggs. Snail eggs are commonly seen in clusters in damp conditions.
Eggs are laid by spiders, scorpions, and other arachnids. Spider eggs are usually encased in silk sacs and can be discovered in a variety of places depending on the species.
Monotremes are a type of animal that lays eggs. The platypus and echidna are the only known monotremes.
While most marsupials give birth to very immature young that develop in a pouch, other species, such as the echidna, lay eggs.