Camouflage

Camouflage is a clever way that animals, objects, and even people use to hide or blend in with their surroundings. It helps them stay safe by making it harder for others to see them. For example, a leopard looks like the trees and bushes around it, while a leaf-mimic katydid looks just like a leaf to stay safe.

In the military, soldiers have used special clothing called battledress to hide, especially since the 19th century when better guns made hiding very important. During World War II, artists made special patterns to help hide ships and vehicles.

Camouflage isn’t just for nature and war. We also use it in everyday life, like covering cell telephone towers so they blend into the landscape or using camouflage patterns in fashion. It’s a fascinating idea that appears in art, stories, and many other places.

History

In ancient Greece, Aristotle talked about how animals like the octopus can change their colors to hide or to signal others.

Camouflage has been studied in animals for a long time. Charles Darwin suggested that hiding helps animals survive and have more babies. Scientists like Edward Bagnall Poulton and Hugh Cott looked at how animals use colors and patterns to blend in with their surroundings. Some animals look like leaves or other objects, while others have bold patterns that break up their shapes to stay hidden.

Evolution

Studying how camouflage develops is hard because we don't have many fossils showing it. Camouflage helps animals survive by blending in, and it is passed down through generations. We need to look at genes and the environment to understand it better.

Fossils from the Cretaceous period show that some sea reptiles had darker backs and lighter bellies to blend in. Insects like lacewings have been hiding this way for over 100 million years by sticking debris on their bodies. There is also evidence that some dinosaurs were camouflaged.

Different animals have different genetic ways to develop camouflage. For example, some sea creatures can change their colors using special genes. In other animals, genes that help with camouflage come from changes and transfers of existing genes. The same genes can help many different animals develop colors that help them hide.

Principles

Further information: List of camouflage methods

Camouflage can be done in different ways. These methods help hide something by making it look like its surroundings. Some methods also work without hiding. They can be used alone or together. Some ways of hiding work with our eyes, but others use scent or sound. These methods can also help protect military equipment.

Background matching

Some animals have colors and patterns that match where they live. This helps them hide. For example, birds that live in trees are mostly green. Birds on the forest floor are brown and speckled. Birds in reed beds are streaked brown and buff. Desert animals are colored like the desert, in tones of sand, buff, ochre, and brownish grey. This includes mammals like the gerbil and fennec fox, birds such as the desert lark or sandgrouse, and reptiles like the skink or horned viper. Military uniforms, like khaki, are also colored to look like their backgrounds.

Disruptive coloration

Main article: Disruptive coloration

Disruptive patterns use strong, contrasting markings like spots or stripes. These break up the shape of an animal or vehicle. They can hide important features, like the eyes, as in the common frog. Predators like the leopard use this to get closer to their food. Prey animals use it to stay hidden. Disruptive patterns are also used in military uniforms and vehicles. But they don’t always work by themselves because shape, shine, and shadow can still give away an animal or vehicle.

Countershading

Main article: Countershading

Countershading uses graded color to balance shadows. This creates a flat look. Shadows make an animal appear darker below than on top. Countershading makes the top darker and the bottom lighter, helping the animal blend in against the right background. Land animals like gazelles and grasshoppers use this. Sea animals like sharks and dolphins also use it. Birds such as snipe and dunlin use countershading too.

Eliminating shadow

Some animals, like the horned lizards of North America, have ways to reduce their shadows. Their bodies are flat, and their sides thin to an edge. They press their bodies to the ground, and their sides have white scales that hide and break up shadows. Some butterflies, like the speckled wood, minimize their shadows by closing their wings, aligning their bodies with the sun, and tilting to one side.

Distraction

Main article: Distractive markings

Many prey animals have bright, high-contrast markings. These distractive markings draw the predator’s eye away. They help hide the prey by stopping the predator from seeing the whole animal, like by hiding its outline.

Cryptic behaviour

Moving can catch the eye of animals looking for danger or predators hunting. Hiding often needs behaviour that blends in, like lying still to avoid being seen. Stalking predators such as the tiger move slowly and quietly to watch their prey.

Motion camouflage

Main article: Motion camouflage

Most hiding methods don’t work when something moves because motion is easy to see. But some insects, like hoverflies and dragonflies, use motion camouflage. Hoverflies use it to get close to mates, and dragonflies use it to defend areas. Motion camouflage works by moving so that the target sees the pursuer on a straight line to a fixed point, making it seem like the pursuer isn’t moving.

Mimesis

Further information: Mimicry and Cryptic aggressive mimicry

In mimesis (also called masquerade), the hidden object looks like something else that is not important to the observer. Mimesis is common in prey animals. For example, a peppered moth caterpillar looks like a twig, or a grasshopper looks like a dry leaf. It is also found in nests; some wasps build nests that look like the leaves around them.

Motion dazzle

Not to be confused with dazzle camouflage.

Most hiding methods don’t work when something moves. A deer or grasshopper is hard to see when still but easy to see when moving. But motion dazzle uses bold, contrasting stripes that move quickly. This can make it harder for predators to know the prey’s speed and direction, helping the prey escape. Motion dazzle is most effective at high speeds. As of 2011, it had been suggested for military vehicles but never used. Motion dazzle makes animals harder to find when moving but easier to see when still, so there is a balance between motion dazzle and hiding.

Mechanisms

Animals can hide by changing their looks to match where they live. For example, chameleons and octopuses can change their skin colors and patterns, helping them blend in. Some animals, like the Arctic fox, change their fur color with the seasons—from brown in summer to white in winter.

Other creatures cover themselves with leaves, sand, or shells to look more like their environment. This trick is also used by people, like when soldiers wear special outfits to stay hidden. Some sea animals, like jellyfish, are mostly see-through, which makes them hard to spot in the water. Fish such as sardines and herring have silvery skin that shines and hides them from predators.

Applications

Military

Main articles: Military camouflage and List of military clothing camouflage patterns

Camouflage has been used in military settings for a long time. In the past, pirate ships were painted to hide them. Later, soldiers wore special clothing to blend into their surroundings. This helped keep them safe.

In the 1800s, soldiers needed better ways to hide as weapons became more accurate. Some wore green jackets to blend into forests. In the 1900s, armies painted buildings and vehicles to match their environments. This made them harder to see from far away.

In both World Wars, artists helped hide soldiers, vehicles, and even towns. They used colors and patterns to break up shapes, making it hard for enemies to spot what was hidden. Airplanes and ships were also painted special colors to stay hidden.

Hunting

Hunters have used camouflage for a long time. They wear clothing that matches forests or fields to get closer to animals without being seen. Modern hunters use special fabrics with patterns that break up their shape, helping them stay hidden.

Civil structures

Sometimes, buildings or towers are painted to look like something else. For example, tall towers are made to look like trees to fit better with their surroundings. This helps them blend in.

Fashion, art and society

Camouflage patterns are popular in fashion and art. Artists and designers use these patterns in clothes and paintings. These patterns can be seen in many places, from protests to fashion shows.