From a butt-sniffing monkey to a couple of ostriches that threaten to peck Dave's eyes out, it's been a wild ride for Jack Hanna, appearing on David Letterman's show numerous times throughout the years.

Letterman's final 'Late Show' is quickly approaching on May 20th. And with Jack Hanna bringing his 'Into the Wild' show to Flint's Whiting Auditorium tonight, we thought today would be a perfect time to watch this Hann-tastic compilation of some of Hanna's best moments with Letterman.

- George McIntyre
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