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The Bird That Returned

-Submitted by Student Reporter, Vedika Yadav, Age 13, Aligarh, U.P.

The Aldabra Rail is a flightless bird found on the Aldabra Atoll in the Indian Ocean. It is a descendant species (type) of a bird called the White Throated Rail. Its current existence is an example of a rare process called Iterative Evolution.

An Atoll [shown in the image below] is a ring-shaped coral reef or island that encloses a tidal pool completely or in part. 

When a distinct population of a living organism is wiped out from existence but is recolonized by the members of the source population, it is known as Iterative Evolution. This chicken-sized bird became extinct about 136,000 years ago because of a major flood that wiped out all the terrestrial animals that lived in the region. Thousands of years later the sea levels reduced making life possible on these islands again. And, according to a recent study (by the University of Portsmouth’s biologists Julian P. Hume and David Martill), the once-extinct Aldabra Rail came back. This process has repeated not once but on two different occasions. This happened because the White Throated Rail flew to these islands, lost its ability to fly because of an absence of predators and after a few years, evolved into the Aldabra Rail. Is this an interesting form of evolution?

What do you think would happen, if the animals shown in the Ice Age, Manny (the Wooly Mammoth), Diego (the Saber-toothed Cat) and Sid (The Megalonyx Sloth), were to come back to Earth? 

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We publish The The Pink Buzz fortnightly. Copies are delivered Digitally or by Registered Courier or Post.