Cape Sable Seaside Sparrow
Ammospiza maritima mirabilis
The Cape Sable Seaside Sparrow is a small, federally endangered songbird found only in seasonally flooded marl prairies of the southern Everglades.
This Florida-endemic subspecies depends on open marl prairie that stays dry long enough for nesting but retains the wetland plant community it needs. It avoids dense sawgrass and areas that remain deeply flooded.
Water management, wildfire, hurricanes, invasive plants, and sea-level rise all affect its limited habitat. Quiet observation and strict protection of breeding areas are essential.
Habitat:
Freshwater Wetlands, Grasslands and Agricultural Areas
Area / Range:
South Florida
Diet:
Adults eat insects, spiders, small aquatic invertebrates, grass seeds, and other plant material. Nestlings receive mostly animal prey.
Behavior:
Males sing from exposed stems during the breeding season. Pairs build low cup nests in dense prairie grasses above the ground and move locally as water levels change.
Day, Dawn, Dusk
Active Times:
Best time to see:
Late winter through spring from authorized Everglades viewpoints, without entering closed breeding habitat.
Florida Native Status:
Native endemic subspecies
Conservation Status:
Federally endangered and protected by Florida law. The remaining population is restricted to a few areas of the southern Everglades.
Safety Level:
Low Risk
Safety Information:
Observe only from legal public areas. Do not enter nesting habitat, play calls, or approach singing birds.
Benefits to Property:
The sparrow is an indicator of healthy marl-prairie hydrology and supports insect control within its natural ecosystem.
Property Concerns:
It creates no property damage. Changes to drainage, fire patterns, or wetland vegetation near occupied habitat can harm the species.
Fun Fact:
This bird exists nowhere outside South Florida. It was once treated as a form of the seaside sparrow but has evolved distinctive Everglades habitat needs.
Wildlife Laws:
The Cape Sable Seaside Sparrow is protected under the federal Endangered Species Act and Migratory Bird Treaty Act. Capturing, harming, harassing, or disturbing birds, nests, or eggs is prohibited without authorization.
Identification:
Look for a small streaked sparrow with a gray face, yellow eyebrow and shoulder area, white throat, brown-streaked breast, and a long narrow bill. Its song is a thin buzz delivered from grass stems.