Most animals produce calls that reflect their body size. A larger animal will sound lower-pitched because its vocal tract, the air-filled tube that produces and filters sounds, is longer. But harbor seals do not always sound like they look. They may sound larger—perhaps to impress a rival—or smaller—perhaps to get attention from their mothers. Are these animals very good at learning sounds (vocal learners), or have their vocal tracts adapted to allow this vocal flexibility?
Click here for original story, Anatomical study confirms that harbor seals are good at learning varied calls
Source: Phys.org