Moults

Moulting, also known as shedding or ecdysis, is the process by which an animal, such as an insect, reptile, or bird, sheds its outer layer. This outer layer can be skin, feathers, hair, or an exoskeleton. Moulting is a natural and essential part of growth and development for many species.

In insects, moulting is crucial for growth. As an insect grows, its exoskeleton, which does not grow, becomes too tight. The insect then sheds this old exoskeleton and secretes a new, larger one. This process is controlled by hormones.

Reptiles, like snakes and lizards, shed their skin periodically. This allows them to grow and also helps to remove parasites and repair damaged skin. The old skin is often shed in one piece, though some species shed it in flakes.

Birds moult their feathers, typically once a year. This process replaces worn-out feathers with new ones, which is important for insulation, flight, and display. Feather moult can take several weeks to complete.

Mammals also shed hair or fur, a process called molting. This shedding helps maintain a healthy coat, with seasonal molts often occurring to adapt to changing temperatures.

The frequency and timing of moulting vary greatly depending on the species, age, and environmental conditions. Some animals moult multiple times a year, while others may only moult once in their lifetime, such as after reaching adulthood. During the moulting process, an animal is often vulnerable as its protective outer layer is temporarily absent or underdeveloped.