Have you ever wondered
why soldiers are always clad in green? This is to enable them to camouflage themselves
during wartime. Hiding in the jungles, their green attire blend into the
surrounding trees and shrubs, making it difficult for the enemies to spot them.
Long before man make
use of camouflaging, insects have already adopted the tactic of disguise to
escape from the clutches of their predators. By having body colors close to
those of the rocks and dried leaves, they catch less attention from the
predators and hence escape from being pursued. However, this kind of disguise
works only if the insects remain still in the presence of their predators.
Butterflies and moths
have developed a variety of camouflage strategies since they are quite
defenceless and their predators - birds are abundant in supply. Many moth
caterpillars resemble dead twigs while the young of certain species of
butterflies appear like bird droppings. Adult butterflies and moths camouflage
themselves too, in attempts to escape from their hunters -- birds who are
superior gliders. Possessing wings which resemble dried leaves help certain
butterflies and moths to hide among heaps of dried leaves when predators are
around.
Fortunately, not all
insects choose the art of disguise to escape from their predators; otherwise,
the world would be so dull and colorless. There are insects which assimilate the
bright body colors of bees and wasps to escape from being pursued by their
predators. The concept of mimicry was derived, owing to the bees and wasps.
Long ago, birds have already learnt to avoid brilliantly colored wasps and bees
in fear of their painful stings. Hence, over millions of years, many harmless
insects have assimilated the bees and wasps by imitating their bright body
colors and shapes. In this way, they appear dangerous to their predators and
hence ward them off.
Mimics of the wasps and
bees are most commonly found in the gardens. The furry, plump bee-fly not only
appears like the bumble bee in terms of body colors, even its hums sound
similar too. The only difference is that the bee-fly does not have a sting and
is hence harmless. The hoverfly is another insect which imitates the body
colors of the wasps. Their bodies are striped yellow and black. The only
deviations are that hoverflies do not have stings and they have only one pair
of wings each while wasps have two pairs each. These variations are hardly
noticed by the predators and hence help them to escape.
Summary: Camouflaging and
mimicry have helped defenceless insects escape from their predators.
Camouflaging requires insects to have body colors close to the surroundings so
as to appear less eye-catching to predators. The moth caterpillars look like
dead twigs while certain butterfly caterpillars resemble bird droppings. Some
butterflies and moths have wings that resemble dried leaves. Mimicry requires
harmless insects to adopt the body colors and shapes of the wasps and bees so
as to fool their predators into thinking that they are dangerous. Predators
usually avoid them, thinking they have stings too. The bee-fly and hoverfly
assimilate the body colors of the bumble bee and wasps respectively and the
bee-fly even hums like the bumble bee.
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