Mitochondrial and microsatellite genetic data from Cape Sable seaside sparrow feather samples collected 2011-2018

The federally endangered Cape Sable seaside sparrow (Ammospiza maritima mirabilis) is endemic to the Greater Everglades ecosystem in southern Florida. The subspecies inhabits the fragmented freshwater marl prairies and contains six subpopulations (A-F), named for management purposes, since genetic information is lacking. To evaluate genetic connectivity and inform management decisions, feather samples were collected between 2011 and 2018 from 108 sparrows across five subpopulations (A-E). Sequence data for four mitochondrial DNA markers (N = 36–69) and 12 nuclear microsatellite loci (N = 55) are provided. The mitochondrial markers used were Cytochrome b (Cytb), control region D-loop, NADH dehydrogenase 2 (ND2), 16S ribosomal RNA (16S).