The shoebill is a large wading bird from swamps in east-central Africa, named for its huge shoe-shaped bill. In the wild it clatters that bill to communicate at the nest and to greet other birds, producing a sound often compared to a machine gun. Videos of shoebills staring motionlessly at zookeepers and visitors spread widely on TikTok and YouTube, and editors began isolating the clatter as a standalone reaction sound for intimidating or absurd animal moments.