Didn't New Zealand once have a large predatory ground bird that is now extinct?
Or am I thinking of someplace else?

Moa Bird (New Zealand) (Probably ate all the mammals,lol)
I don't know if it was pedatory or not but,yes, they had a large, I believe flightless, bird that recently(within several centuries)went extinct.
Yeah. The Maoris ate 'em all and now there ain't no moa.