Update 2019-05-11, 23.16: the Text has been added for clarification.
The vitstrupiga rallen, a bird as large as a chicken and flightless, lived on the island of Aldabra in the Indian Ocean for 136.000 years ago and died out when the island ended up under water.
But with the time lost rallen their ability to fly, because there are predators on Aldabra, which made it necessary for the bird that have to escape. Unfortunately, it also meant that the bird could not fly when the island ended up under water for 136.000 years ago.
from Madagascar, but has, on several occasions, emigrated and a few have managed to get to the islands in the Indian Ocean.
Now scientists have discovered that rallfåglar undergone a so-called iterative evolution. It means that at two separate times – tens of thousands of years between them – have rallfåglar developed in the same direction and lost the ability to fly, it writes CNN.
this is The first time it has been with rall, and it is also one of the clearest cases of interativ evolution ever seen in any fågelfamilj, write researchers at London's Natural history museum in a study of rallen.
that has been found on the island has helped researchers to compare today's rall with its ancestors.
In the study summary the researchers write that ”the Fossil evidence presented here is unique to the rail family, and demonstrate the birds ' ability to successfully colonize isolated islands and develop flyglöshet on several occasions.”
Clarification: It is the same as (lost flight), which has evolved several times in the same fågelfamilj.