sentence: All birds have a large gland at the top part of their bill, above their eyes.
sentences_before: Albatrosses need to take salt out of their body because they drink ocean water.
sentences_after: This gland is sometimes useless to birds that do not need it. However, albatrosses use them to help take out saltwater. Scientists are not sure how it works exactly. However, they know that it helps take out the salt. It makes a liquid that makes the saltwater drip out of their nose.
concept_name: bird
headings: Albatross Biology Flight
categories: Procellariiformes Seabirds