Eoalulavis is an Enantiornithine from early Cretaceous Spain. At the time it was discovered, it was the oldest known bird to have the alula, a special feather on the thumb that helps birds steer.
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Dinopedia
Eoalulavis is an Enantiornithine from early Cretaceous Spain. At the time it was discovered, it was the oldest known bird to have the alula, a special feather on the thumb that helps birds steer.