In the UK, most of the cuckoo gray and brown. Sometimes this bird looks like a hawk. But others have a reddish brown coat similar to a kestrel bird.
Scientists from Cambridge University, England, studied the evolution of coat color cuckoo. They studied the reaction of reed warbler to the cuckoo bird who tried to disguise and infiltrate the nest and lay eggs. This strategy to maintain the population.
Reed warbler bird will try to fend off the coming of the cuckoo which has a color similar to its neighbors. Cuckoo often know this and develop the fur with a second color in order to infiltrate into the reed warbler nests.
“Cuckoo plumage evolved alternative to sneak into other birds’ nests,”. Disguised cuckoo behavior explains why many species of birds that use mimicry and develop various forms of camouflage.
Other researchers, Rose Thorogood, said the cuckoo behavior led to unrest in the world of birds, especially those that are laying eggs. Other birds become anxious and suspicious. Therefore, they must continue to observe the presence of cuckoo to spy on their neighbors. “They not only learn from experience but from what is happening around them,” said Thorogood.
Despite the crafty and unsettling, posing cuckoo behavior is actually one way to survive. This bird mimicry to develop methods to maintain its population dropped drastically last quarter century.
There are various reasons cuckoo population decline. Began to decline in the number of caterpillars due to forest destruction in the UK until the destruction of habitat on African soil so the birds can not get through the winter.