Matilda first appeared as one of the playable birds in Rovio's Angry Birds, released in 2009, where she is the white bird known for dropping explosive eggs. Her selection sound became familiar through repeated play across the mobile games, sequels and spin offs that followed as the flock expanded. Players learned to link her squawk with choosing a heavier, tactical bird rather than a fast one. Online, that association carried into fan videos, soundboards and meme edits, where the clip now signals an annoyed chicken character being picked for action.