Authenticated (05/12/2006) by Dr. Alain Crivelli, Chair of the IUCN Pelican Specialist Group.
http://www.wetlands.org/specialistgroups/en/listmenu.aspx?id=24c5a51d-27f7-411c-a5ca-9d5db2b505f3
Guano: Accumulated droppings found where large colonies of animals such as seals, bats or birds occur; it is rich in plant nutrients.