Finally , they have a salt gland that is located above their nasal passages and helps desalinate their body , as they drink seawater .
They also have a uniquely structured bill , with seven to nine distinct horny plates .
They have a salt gland that is located above their nasal passages and helps desalinate their body , as they drink seawater .
They also have a uniquely structured bill , with seven to nine distinct horny plates .