Cape Sable seaside sparrow

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Cape Sable seaside sparrow
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In Everglades National Park
Status TNC T1.svg
Critically Imperiled  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Passerellidae
Genus: Ammospiza
Species:
Subspecies:
A. m. mirabilis
Trinomial name
Ammospiza maritima mirabilis
(Howell, 1919)
Synonyms [4] [5]
  • Ammodramus maritimus mirabilis(A. H. Howell, 1919)
  • Thryospiza mirabilisA. H. Howell, 1919

The Cape Sable seaside sparrow (Ammospiza maritima mirabilis) is a subspecies of the seaside sparrow, a species of bird in the family Passerellidae native to the United States. This subspecies is endemic to southern Florida. It is designated endangered under the Endangered Species Act.

Contents

Description

The Cape Sable seaside sparrow is 13 to 14 centimeters (5.1 to 5.5 in) in length. The back is dark olive-gray and the tail and wings are olive-brown. Adults are light gray on the belly to almost white with dark olive-gray streaks on the breast and sides. [6]

Biology

This subspecies occurs in prairie habitat, breeding in mixed marl prairie dominated by gulf hairawn muhly ( Muhlenbergia sericea ). [6] The sparrow makes cup-shaped nests attached to vegetation a few inches above the ground. [7] A female may produce two clutches per season, and a third if conditions are favorable. [6]

Males are very territorial, claiming a patch of prime breeding habitat and defending it. Most vocalizations are produced by the males, which perch and call loudly to defend territory and advertise to females. [6]

Courtship behavior includes males chasing females and offering them food and nesting materials. Females may initiate the process by approaching males and begging. Male and female raise their clutch of young together, and may remain together for the next clutch. [6]

This subspecies is omnivorous, gleaning plant and animal items from the ground, including seeds, insects, and marine invertebrates. [6]

Ecology

The Cape Sable seaside sparrow lives on the prairies of the Everglades. The largest populations are in Big Cypress National Preserve and Taylor Slough in Everglades National Park. The common name of the bird refers to Cape Sable, the southernmost point of mainland Florida and part of the Everglades. [7]

This bird requires aquatic prairie with low water levels and open areas. Sea level rise, alterations in water flow caused by water management practices in South Florida, and natural processes such as hurricanes, have caused water level changes and flooding, reducing available habitat. Fire suppression has increased the plant density and diversity in the area, reducing the open habitat required by the sparrow. These factors contributed to its decline. [7]

The bird is strongly influenced by water levels. Water level rise effectively halts breeding activities, in part because nests are suspended just off the ground. Daily water level shifts even affect behavior, subduing vocalizations by territorial males. [6]

The bird's sensitivity to environmental conditions have earned it the nickname "Goldilocks bird", because for it to succeed, conditions must be "just right". [8]

Conservation

Water levels are tightly managed in many wetland regions in South Florida, with flood gates controlling water flow in parts of the Everglades. The flood gates were opened after heavy rains in the winter of 2016, inundating areas where water levels have been relatively low for decades. Sparrows in these areas immediately lost breeding habitat. Water management officials continue to balance species conservation with the adverse effects of flooding in this region. [9]

In August 2013, Duke University scientist Stuart Pimm and the Center for Biological Diversity announced filing of a lawsuit against the U.S. Army Corps of Engineers and U.S. Fish and Wildlife Service. At issue was the continuing release of water flooding the Cape Sable seaside sparrow's habitat. The lawsuit alleged the practice to be in violation of the Endangered Species Act. [10]

In 2016, the two agencies involved announced plans for further conservation activities to support the sparrow. These include stewarding areas that contain the best potential breeding habitat, and identifying areas that may serve as potential breeding sites as sea levels rise. [11]

The bird illustrates the umbrella species concept of conservation biology, in that thorough protection of this taxon would require protection of a particular habitat and ecosystem, which would result in benefits for a great many other species. [8]

Related Research Articles

<span class="mw-page-title-main">Everglades National Park</span> One-and-a-half million acres in Florida (US) managed by the National Park Service

Everglades National Park is an American national park that protects the southern twenty percent of the original Everglades in Florida. The park is the largest tropical wilderness in the United States and the largest wilderness of any kind east of the Mississippi River. An average of one million people visit the park each year. Everglades is the third-largest national park in the contiguous United States after Death Valley and Yellowstone. UNESCO declared the Everglades & Dry Tortugas Biosphere Reserve in 1976 and listed the park as a World Heritage Site in 1979, and the Ramsar Convention included the park on its list of Wetlands of International Importance in 1987. Everglades is one of only three locations in the world to appear on all three lists.

<span class="mw-page-title-main">Piping plover</span> Species of bird

The piping plover is a small sand-colored, sparrow-sized shorebird that nests and feeds along coastal sand and gravel beaches in North America. The adult has yellow-orange-red legs, a black band across the forehead from eye to eye, and a black stripe running along the breast line. This chest band is usually thicker in males during the breeding season, and it is the only reliable way to tell the sexes apart. The bird is difficult to see when it is standing still, as it blends well with open, sandy beach habitats. It typically runs in short, quick spurts and then stops.

<span class="mw-page-title-main">Grasshopper sparrow</span> Species of bird

The grasshopper sparrow is a small New World sparrow. It belongs to the genus Ammodramus, which contains three species that inhabit grasslands and prairies. Grasshopper sparrows are sometimes found in crop fields and they will readily colonize reclaimed grassland. In the core of their range, grasshopper sparrows are dependent upon large areas of grassland where they avoid trees and shrubs. They seek out heterogenous patches of prairie that contain clumps of dead grass or other vegetation where they conceal their nest, and also contain barer ground where they forage for insects, spiders, and seeds. Grasshopper sparrows are unusual among New World sparrows in that they sing two distinct song types, the prevalence of which varies with the nesting cycle. The primary male song, a high trill preceded by a stereotyped series of short chips, is reminiscent of the sounds of grasshoppers and is the origin of this species' name. Like some other birds of the central North American grasslands, this species also moves around a lot, not only via annual migrations, but individuals frequently disperse between breeding attempts or breeding seasons. Grasshopper sparrows are in steep decline across their range, even in the core of the breeding distribution in the tallgrass prairies of the central Great Plains. The Florida grasshopper sparrow is highly endangered.

<span class="mw-page-title-main">Henslow's sparrow</span> Species of bird

Henslow's sparrow is a passerine bird in the family Passerellidae. It was named by John James Audubon in honor of John Stevens Henslow. It was originally classified in the genus Emberiza and called Henslow's bunting.

<span class="mw-page-title-main">LeConte's sparrow</span> Species of bird

LeConte's sparrow, also known as LeConte's bunting, is one of the smallest New World sparrow species in North America.

<span class="mw-page-title-main">Baird's sparrow</span> Species of bird

Baird's sparrow is a species of North American birds in the family Passerellidae of order Passeriformes. It is a migratory bird native to the United States, Canada, and Mexico.

<i>Ammodramus</i> Genus of birds

Ammodramus is a genus of birds in the family Passerellidae, in the group known as American sparrows. Birds of this genus are known commonly as grassland sparrows. The name Ammodramus is from the Greek for "sand runner".

<span class="mw-page-title-main">Snail kite</span> Species of bird

The snail kite is a bird of prey within the family Accipitridae, which also includes the eagles, hawks, and Old World vultures. Its relative, the slender-billed kite, is now again placed in Helicolestes, making the genus Rostrhamus monotypic. Usually, it is placed in the milvine kites, but the validity of that grouping is under investigation.

<span class="mw-page-title-main">Dusky seaside sparrow</span> Extinct subspecies of bird

The dusky seaside sparrow 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, and the subspecies was officially declared extinct in December 1990.

<span class="mw-page-title-main">Taylor Slough</span>

Taylor Slough, located in the southeastern corner of the Florida Everglades, along with the much larger Shark River Slough farther to the west, are the principal natural drainages for the freshwater Everglades and the essential conduit for providing overland freshwater to Florida Bay.

<span class="mw-page-title-main">Cape Sable</span> Southernmost mainland of Florida and contiguous US

Cape Sable is the southernmost point of the United States mainland and mainland Florida. It is located in southwestern Florida, in Monroe County, and is part of the Everglades National Park.

<span class="mw-page-title-main">Seaside sparrow</span> Species of bird

The seaside sparrow is a species of American sparrow.

Scott's seaside sparrow is a subspecies of the seaside sparrow. It was originally thought to be a separate species but later reconsidered as a subspecies of the seaside sparrow.

<span class="mw-page-title-main">Geography and ecology of the Everglades</span> Details of the natural environment of the Everglades

Before drainage, the Everglades, a region of tropical wetlands in southern Florida, were an interwoven mesh of marshes and prairies covering 4,000 square miles (10,000 km2). The Everglades is both a vast watershed that has historically extended from Lake Okeechobee 100 miles (160 km) south to Florida Bay, and many interconnected ecosystems within a geographic boundary. It is such a unique meeting of water, land, and climate that the use of either singular or plural to refer to the Everglades is appropriate. When Marjory Stoneman Douglas wrote her definitive description of the region in 1947, she used the metaphor "River of Grass" to explain the blending of water and plant life.

<span class="mw-page-title-main">Restoration of the Everglades</span> Effort to remedy 20th-century damage inflicted on the environment of southern Florida

An ongoing effort to remedy damage inflicted during the 20th century on the Everglades, a region of tropical wetlands in southern Florida, is the most expensive and comprehensive environmental repair attempt in history. The degradation of the Everglades became an issue in the United States in the early 1970s after a proposal to construct an airport in the Big Cypress Swamp. Studies indicated the airport would have destroyed the ecosystem in South Florida and Everglades National Park. After decades of destructive practices, both state and federal agencies are looking for ways to balance the needs of the natural environment in South Florida with urban and agricultural centers that have recently and rapidly grown in and near the Everglades.

<span class="mw-page-title-main">Nelson's sparrow</span> Species of bird

Nelson's sparrow is a small New World sparrow.

<span class="mw-page-title-main">Saltmarsh sparrow</span> Species of bird

The saltmarsh sparrow is a small New World sparrow found in salt marshes along the Atlantic coast of the United States. At one time, this bird and the Nelson's sparrow were thought to be a single species, the sharp-tailed sparrow. Because of this, the species was briefly known as the "saltmarsh sharp-tailed sparrow." Saltmarsh sparrow numbers are declining due to habitat loss largely attributed to human activity.

<span class="mw-page-title-main">Florida grasshopper sparrow</span> Subspecies of bird

The Florida grasshopper sparrow is an endangered subspecies of grasshopper sparrow native to the dry prairies of south-central Florida.

<span class="mw-page-title-main">Marl prairie</span>

Marl prairies are wet prairies that allow for a slow seepage of overland water and exist in the Everglades, usually bordering deeper sloughs, and contain low-growth vegetation.

<i>Ammospiza</i> Genus of birds

Ammospiza is a genus of birds in the family Passerellidae, in the group known as American sparrows.

References

  1. "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 10 November 2022.
  2. "Cape Sable seaside sparrow (Ammodramus maritimus mirabilis)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 21 April 2023.
  3. 32 FR 4001
  4. "Ammospiza maritima mirabilis (A. H. Howell, 1919)". Integrated Taxonomic Information System . Retrieved 21 April 2023.
  5. "Ammodramus maritimus subsp. mirabilis (A.H.Howell, 1919)". Global Biodiversity Information Facility . Retrieved 21 April 2023.
  6. 1 2 3 4 5 6 7 "Cape Sable Seaside Sparrow" (PDF). United States Fish and Wildlife Service. 1999. Archived from the original (PDF) on 14 January 2019.
  7. 1 2 3 Cape Sable Seaside Sparrow: Species Profile. National Park Service.
  8. 1 2 Braun, David Maxwell (21 February 2017). "The "Goldilocks" Sparrow That's Shielding the Everglades". National Geographic. Archived from the original on 11 August 2017.
  9. Staletovich, Jenny (1 April 2016). "Wet South Florida winter puts rare Everglades sparrow in danger". Miami Herald.
  10. Center for Biological Diversity Press Release (August 13, 2013). "Lawsuit Launched Challenging Ongoing Flooding of Endangered Cape Sable Seaside Sparrow Habitat and Everglades National Park" . Retrieved August 13, 2013.
  11. Smith, Nancy (23 July 2016). "Saving the Cape Sable Seaside Sparrow and restoring Everglades balance is possible after all". Sunshine State News.