[Central Scrutiniser]

And all the wood boring insects as well.

Them tigers musta got real hungry climbing down that mountain after all the plants were wiped out, I betcha they ate the two unicorns.

[VadeRetro]

But ony two big cats were needed, since tigers and lions are still interfertile and can have fertile offspring (barely). There's still some cross-fertility between lions and leopards as well. The big cats of today must have diverged very rapidly indeed in 4000+ years since some founder pair stepped off the ark.

And I thought I believed in evolution!