Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Dusky Seaside Sparrow, Ammodramus maritimus nigrescens, was a non-migratory subspecies of the Seaside Sparrow, found in Southern Florida in the natural salt marshes of Merritt Island and along the St. Johns River. The last one died on June 17, 1987 and the species was officially declared extinct in December 1990. The dusky's demise began in 1940 when DDT was sprayed on the marshes for the control of mosquitoes. This pesticide entered the bird's food chain which caused the population to go from 2,000 to 600 breeding pairs. When Merritt Island was flooded with the goal of reducing the mosquito population around Kennedy Space Center, the sparrows' nesting grounds were devastated, and their numbers plummeted. Later, the marshes surrounding the river were drained, to facilitate highway construction; this was a further blow. Eventually, pollution and pesticides took such a high toll that by 1979, only six dusky seaside sparrows were known to exist — all of whom were males; a female was last sighted in 1975.

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