Penguins drink saltwater and filter it with glands

Penguins, as marine birds, drink ocean saltwater and possess a remarkable adaptation to handle its high salt content. Specialized supraorbital salt glands, located above their eyes, filter excess sodium from their bloodstream. These glands concentrate salt into a briny solution, which is then expelled through their nostrils, appearing as a drip. This process allows penguins to stay hydrated and maintain electrolyte balance even when fresh water is scarce.