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The white throat rallids reappeared after being extinct 130 thousand years ago on an island in Madagascar. How did this happen?
It seems a lie, but this bird became extinct 130 thousand years ago when the island of Aldabra, Madagascar, where it lived, was submerged in the depths of the sea. The bird could not escape the flood because it had lost its ability to fly. According to Nat Geo, the inability to fly occurred because there were no predators in the ecosystem, and the flight became a censer.
Leer en español: ¡Increíble! 130 mil años después aparece ave extinta
Now, more than a thousand years later, the bird once again colonized the island of Aldabra. An incredible fact that amazes the scientific community. In addition to returning, there is another fact that makes this animal surprising. The study published in the Zoological Journal shows that not only the bird reappeared, but that its evolutionary process was repeated.
The sea level dropped, and with them, the island resurfaced again. Later the first chickens of this bird appeared and colonized the island once again and lost the ability to fly back. The evolutionary process of the white throat raides was repeated.
The study reveals that "a non-flying Dryolimnas of two temporarily separated Aldabran fossils has been identified, deposited before and after the flood event, providing irrefutable evidence that a member of Rallidae colonized the atoll, probably from Madagascar, and became in non-flying independently on each occasion. The fossil evidence presented here is unique to Rallidae and personifies the ability of the birds on this side to successfully colonize isolated islands and evolve without a flight on multiple occasions. "
Why is this process?
Nat Geo explains that this process is called iterative evolution, which means the repeated evolution of the same species at various moments in history. The study's author, Julian Hume, explained in a press release that "these unique fossils provide irrefutable evidence that a member of the family of the raides colonized the atoll, probably from Madagascar, and became a flightless bird in each chance."
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The evidence is surprising, and according to David Martill, co-author of the publication, this is the clearest example of iterative evolution. In statements collected by CNN, the scientist said that "we know of no other example in rallids, or birds, that demonstrates this phenomenon so clear."
LatinAmerican Post | Marcela Peñaloza
Translated from "¡Increíble! 130 mil años después aparece ave extinta"