Guano deposits on Gardner Pinnacles, Laysan Island, Hawaii, 1969
© Dr. James P. McVey, National Oceanic and Atmospheric Administration, Sea Grant Program.
Seabird manure, a rich source of nutrients, has been used as fertilizer for centuries.
© Dr. James P. McVey, National Oceanic and Atmospheric Administration, Sea Grant Program.
Seabird manure, a rich source of nutrients, has been used as fertilizer for centuries.