How big is mutton bird?

Mutton birds, particularly the short-tailed shearwater (Ardenna tenuirostris), typically measure about 16 to 19 inches (40 to 48 cm) in length, with a wingspan of approximately 36 to 42 inches (90 to 107 cm). They have a stocky body, with a wingspan that allows for efficient gliding over the ocean. Their size and physical features can vary slightly depending on the specific species within the broader category of mutton birds.