Gertie is one of the two (former) secondary antagonists of the 2016 computer-animated film, Ice Age: Collision Course, the other being her brother Roger. She and Roger are the children and henchmen of the tyrannical dino bird Gavin.
She is voiced by Stephanie Beatriz.
Role in the film
She and Roger plan with Gavin to sabotage all animals and fly away from the meteors, so letting them be forgotten. They find The Herd and plot to attack them. Later, they almost kill Buck, but Roger convinces Gavin not to kill Buck, as they help Buck stop the meteors with Gavin's help.