- "He's right there!
I know, roger.
How about we get Sid first, and then go back for Roger?
- ―Buck and Crash and Eddie talking[src]
Roger is the name Buck, a weasel, gave to a Harpactognathus who appears in the third film, and who was used by Buck, alongside with Crash and Eddie, two opossums, to go to the Lava Falls to rescue Sid, a ground sloth, from Rudy, a Baryonyx.
Roger was "commandeered" by Buck, Crash and Eddie in order to save Sid. During the attempt, they were attacked by Quetzacoatlus'. Roger was knocked out, but given mouth-to-mouth by Buck. They saved Sid, but accidentally flew into the ice ceiling above. They returned to the Plates of Woe, just in time to see the arrival of Peaches. When Buck asked Roger if he had ever thought of settling down and starting a family, the Harpactognathus gave him a weird look, then flew away.
Roger has pink skin with green, and red eyes. Like the rest of his kind, he has large wings and mostly flies.