Another evolution question

[b[Gaspode**: Actually I was completely wrong about them being ratites ( which I imagine you already knew :wink: ). Just a bad assumption on my part. You know what happens when we assume :smiley: .The big Phororachoids at least, seem to have been closer to modern Coots and Rails.

As far as predatory mammals go, I may have been half-right. At least in South America, large flightless predatory birds seem to have co-existed with Metatherian predators like the marsupial “Saber-Toothed Cat” just fine. Instead they began to disappear, along with the Metatherian predators, when the second wave of Eutherians arrived ( i.e. the predators, the first wave having been Eutherian herbivores, that had displaced the Metatherian herbivores ). So it wasn’t mammals per se, so much as advanced Eutherian predators that seem to have hastened the end ( at least circumstantially and at least in SA ).

  • Tamerlane