The dusky seaside sparrow (Ammospiza maritima nigrescens) was a non-migratory subspecies of the seaside sparrow, found in Florida in the natural salt marshes of Merritt Island and along the St. Johns River. The last definite known individual died on Walt Disney World's Discovery Island in 1987,[3] and the subspecies was officially declared extinct in December 1990.[2]
^NatureServe (6 January 2023). "Ammospiza maritima nigrescens". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 23 January 2023.
^ abBentzien, Michael M.; Fish and Wildlife Service, Interior (12 December 1990). "Endangered and Threatened Wildlife and Plants; Final Rule to Delist the Dusky Seaside Sparrow and Remove its Critical Habitat Designation". Federal Register. 55 (239): 51112–51114. Retrieved 23 January 2023.
^Newsweek, June 9, 2008 page 45
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