I have a duck in this fight

[ewx]

[Poll #1841488]

Comments

[songster.livejournal.com]

Depends which species of Smilodon: they ranged from half the size of Bullockornis to twice its size, according to Wikipedia at least.

[ronebofh.livejournal.com]

Agreed, but i think Bulluckornis takes the lower two out, so i went with that.

[sesquipedality.livejournal.com]

Clearly the one with the most badass Latin name (http://xkcd.com/1056/) would win.