He is voiced by Max Greenfield, who later played Eric Goldberg in the 2017 film The Glass Castle.
He first appears when he and his sister steal an egg from a mother Triceratops. Roger didn't think it was right, but his dad Gavin disagreed and scolded him. Buck happened to be nearby taking a shower and the family flew off. Buck jumped after them and tossed gases in Gavin and Gertie's faces. He then jumped on Roger, plucked a feather and tickled him to get him let go of the egg.
Personality & Appearance
Roger seems to be the smartest of his family. Unlike his father and his sister, he's caring and able to see reason. He is much smaller than Gavin and Gertie.
Although he stole an egg along with his father and sister, he didn't think it was right to do that.
Roger is a blue Dino-bird who has blue scales, dark-light underbelly and red feathers. He has light brown orange eyes and great eyesight he gets from his mother. He has a slightly scuffed black beak. Unlike the other Dino-birds, Roger's body was rather skinny and lean, possibly due to him being the youngest.