The black-headed duck Heteronetta atricapilla, a little-known South American species, is the only obligate brood parasite whose chicks require no more parental care than incubation as eggs: within a ...

While rapid evolution took place after the mass extinction ... it's still not clear whether it really is a relative of modern ducks and geese, he said. V. iaai existed when global temperatures ...

A newly studied Vegavis iaai skull from Antarctica confirms that modern bird lineages, like ducks and geese, were evolving ...

Clarke notes that the ducks and geese of today are just a small ... has much to tell us about the earliest stages of modern bird evolution,” he said. Fossils of animals and plants from this ...