Several weeks ago, in response to a question sent in by a reader that asked can swans drink seawater, we responded yes, because just above the eyes and under the skin, they have a gland that removes salt from their blood stream and concentrates it in a solution that is excreted from their nostrils. In the photo below, you can see sunlight coming through the nare holes, which are near the base of the bill. When the swan shakes its head, the salt is removed through the nares. Most species of birds have nare holes, which lead to the nasal cavity within the skull, which is part of the respiratory system.
Please join us Thursday night at the Cultural Center at Rocky Neck. For more information on my illustrated talk “Beautiful Birds of Cape Ann” visit this post here.