While waiting to film brown pelicans at Pebble Beach, California, I saw a seagull eating guano on a rock with waves crashing behind it and brown pelicans doing fly-bys behind it.
The sound of the waves crashing is excellent on the video below:
Guano is bird feces. It is highly sought as a fertilizer and wars have been fought over it.
Video and text by Ruth Paget, author Eating Soup with Chopsticks and Marrying France