“Bart the Mother” is the third episode of Season 10. It originally aired on September 27, 1998. The episode was written by David S. Cohen and directed by Steven Dean Moore.
Bart accidentally kills a mother bird with Nelson Muntz’s bee-bee gun, and tries his best to raise the mother’s eggs on his own. But when the hatchlings turn out to be a pair of destructive lizards that harvest nests for their own survival, the town’s bird population is placed at great risk.