Grizzly bears, snowy egret and harbor seals fished along the windy sloughs. Rallus [longirostris, crepitans, obsoletus or wetmorei, excl. 2012. 11 Rallus obsoletus (cat.) California Clapper Rails (Rallus longirostris obsoletus) are an endangered waterbird that forage in tidal-marsh habitats that… Expand. Birdlife checklist version 06 (Nov 2013) (v.2) Twitter. Avibase taxonomic concepts v. 03 (March 2015) (v.?) It has a long, downward curving bill and is grayish brown with a pale chestnut breast and conspicuous whitish rump patch. Animalia. It has three subspecies: yumanensis (Colorado River area), levipes (southern California), and nominate obsoletus , (San Francisco Bay area). Subspecies Rallus longirostris pallidus. Arrowhead Marsh, Oakland CA kept slowly walking toward me. It is found principally in California's San Francisco Bay, and also in Monterey Bay and Morro Bay. This species is in danger of extinction throughout all or a significant portion of its range. Rallidae. The California Clapper Rail (Rallus longirostris obsoletus ) is one of three subspecies of Clapper Rail recognized by the American Ornithologist’s Union (AOU 1957) and is state- and federally-listed as an endangered species. Avibase taxonomic concepts (current) (v.?) 1996) R. longirostris yumanensis—Declining (Delany and Scott 2002: del Hoyo et al. Bei Getty Images finden … 5 Rallus crepitans (cat.) rhizophorae, nayaritensis]. Avibase taxonomic concepts v. 01 (August 2013) (v.2) Rallus longirostris in uska species han Aves nga ginhulagway ni Pieter Boddaert hadton 1783. Aves. Does mercury contamination reduce body condition of endangered California clapper rails? Avibase taxonomic concepts v. 07 (Feb 2020) (v.?) At its nadir, the population in 1991 was estimated to have declined to between 300 and 500 individuals (Albertson and Evens 2000). [3], Ridgway's rail forages at the upper end of, along the ecotone between mudflat and higher vegetated zones, and in tidal sloughs. DFG TaxonID: 1163: Other Identifying Codes: CNDDB (ABNME05016) , TNS-Global (100535) , CWHR (B144B) Rallus is a genus of wetland birds of the rail family.Sometimes, the genera Lewinia and Gallirallus are included in it. Identity Taxonomic Tree … 1996) R. longirostris levipes—Declining (Delany and Scott 2002: del Hoyo et al. UNITED STATES DEPARTMENT OF AGRICULTURE QLtL? Six of the species are found in the Americas, and the three species found in Eurasia, Africa and Madagascar are very closely related to each other, suggesting they are descended from a single invasion of a New World ancestor. Rallus elegans and R. tenuirostris (del Hoyo and Collar 2014) were previously lumped as R. elegans following AOU (2000).Sibley and Monroe (1990, 1993) included tenuirostris within R. longirostris. Materiales de aprendizaje gratuitos. DFG TaxonID: 1163: Other Identifying Codes: CNDDB (ABNME05016) , TNS-Global (100535) , CWHR (B144B) 6 Rallus elegans (cat.) Clapper rails are secretive and difficult to observe in dense vegetation but they can be often be seen when they are crossing a tidal channel. California Clapper Rail (Rallus longirostris ssp. This chocolate-colored songbird is confined to … The population levels of Ridgway's rail are precariously low due to destruction of its coastal and estuarine marshland habitat by prior land development and shoreline fill. Subspecies Rallus longirostris saturatus. Ongoing Current: U.S. Birdlife checklist version 03 (v.2) Avibase taxonomic concepts v. 06 (Feb 2018) (v.?) Subspecies Rallus longirostris phelpsi. They require shallow water and mudflats for foraging, Arrowhead Marsh, Oakland CA kept slowly walking toward me. Inyo California Towhee. Rallus obsoletus ex. Rallus obsoletus obsoletus, Meadowsweet, Corte Madera, ... Rallus elegans obsoletus ; Rallus longirostris obsoletus; References . Rallus longirostris obsoletus The California Clapper Rail is a chicken sized bird that rarely flies. Mangrove Rail (Rallus longirostris) Ridgway’s Rail (Rallus obsoletus) Clapper Rail (Rallus crepitans) Recent genetic studies have looked at the relatedness of the New World “big rails”, what we have traditionally known as Clapper Rail and King Rail. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. Rallus obsoletus - San Francisco Bay, 2004.jpg 240 × 170; 24 KB Rallus obsoletus - Tijuana Slough NWR (5120918839).jpg 525 × 350; 108 KB Rallus obsoletus levipes eggs.jpg 4,608 × 3,072; 4.54 MB There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages. The California clapper rail is a bird scientifically known as Rallus longirostris obsoletus. Rallus longirostris obsoletus Rallus crepitans obsoletus. rhizophorae, nayaritensis], Mangrove, Clapper or Ridgway's Rail [excl. This species is closely related to the clapper rail, and until recently was considered a subspecies. Prepared for State Coastal Conservancy, San Francisco Estuary Invasive Spartina Project. Rallus longirostris obsoletus. Endangered Species. Tasmania Flightless rail Tribonyx mortierii Tasmania 2012 April 6, 2012. Curated hierarchies for Rallus longirostris obsoletus. B. S. , 1922a, 342. Ridgway's Rail (Rallus longirostris) Ridgway's rail in Meeker Slough, April 5, 2018 Ridgway's rail and two killdeer ( Charadrius vociferus ) in Western Stege Marsh, October 23, 2017 (C) California clapper rail (Rallus longirostris obsoletus) (D) Light-footed clapper rail (Rallus longirostris levipes) (E) California least tern (Sterna antillarum browni) Mangrove Rail (Rallus longirostris) Ridgway’s Rail (Rallus obsoletus) Clapper Rail (Rallus crepitans) Recent genetic studies have looked at the relatedness of the New World “big rails”, what we have traditionally known as Clapper Rail and King Rail. (2010). Highlight taxa in a checklist (shown in red) Nature Picture Library offers the best nature photographs and footage from the world's finest photographers, to license for commercial and creative use. 2 Rallus antarcticus (cat.) 4 Rallus caerulescens (cat.) Some researchers believe that this bird and the similar King Rail are a single species; the two birds are known to interbreed. California Clapper Rail (Rallus longirostris obsoletus) Population monitoring: 2005-2008 Leonard Liu, Julian Wood, Nadav Nur, Diana Stralberg, and Mark Herzog PRBO Conservation Science 3820 Cypress Drive #11, Petaluma, CA 94954 FINAL September 29, 2009 Prepared for: California Department of Fish and Game 4001 N. Wilson Way Stockton, CA 95205 rhizophorae, nayaritensis] (= Rallus longirostris) Boddaert, 1783. summary; taxon grid; synonyms; map; eBird; Wikipedia; NatureServe; ITIS; Flickr; Audio; More links; The Clapper Rail (Rallus longirostris) is a member of the rail family, Rallidae. A member of the rail family, Rallidae, it is a chicken-sized bird that rarely flies. © Denis Lepage | (2012), US-FWS: Species Profile for California Clapper rail (, Seaworld.org: Light-Footed Clapper Rail (, US-FWS: Species Profile for Yuma Clapper rail (, San Francisco Maritime National Historical Park, San Francisco Estuary and Watershed Science, Transportation in the San Francisco Bay Area, https://en.wikipedia.org/w/index.php?title=Ridgway%27s_rail&oldid=991359697, Native birds of the West Coast of the United States, Natural history of San Mateo County, California, Taxonbars without secondary Wikidata taxon IDs, Taxonbars with automatically added original combinations, Creative Commons Attribution-ShareAlike License, This page was last edited on 29 November 2020, at 17:22. Journal: Archives of Environmental Contamination and Toxicology. GBIF classification. Diese Datei ist unter der Creative-Commons-Lizenz „Namensnennung 2.0 generisch“ (US-amerikanisch) lizenziert. Rallus [longirostris, crepitans or obsoletus, excl. Rallus longirostris obsoletus. The bird will only forage on mudflats or very shallow water where there is taller plant material nearby to provide protection at high tide. 6a, 186.--Rankin, J. S., 1944b, 149- 151, 161-162 (char, emend. Mussels, clams, arthropods, snails, worms and small fish are its preferred foods, which it retrieves by probing and scavenging the surface while walking. Rallus obsoletus [= longirostris] yumanensis: Credit: Jim Rorabaugh/USFWS: Office Lead: Nichole Engelmann: Click here for a generalized species location map: Click on the Cactus to View the Document Title Author(s) Year File Size/Source; General Species … 12 Rallus semiplumbeus (cat.) Animalia: information (1) Animalia: pictures (20673) Animalia: specimens (7109) Animalia: sounds (722) Animalia: maps (42) Eumetazoa metazoans. Facebook. 9 Rallus longirostris (cat.) [8] The twig nest is placed low, sometimes among plant roots, and purple-spotted buff eggs are laid. 2 Rallus antarcticus (cat.) Nature Picture Library offers the best nature photographs and footage from the world's finest photographers, to license for commercial and creative use. California Clapper Rail Rallus longirostris obsoletus Status Endangered Listed October 13, 1970 Family Rallidae (Rails, Gallinules, Coots) Description Long-billed, henlike bird; olive-brown above with a cinnamon-buff breast. Birdlife checklist version 04 (v.2) obsoletus) Citation: Trace element and organochlorine concentrations in California clapper rail (Rallus longirostris obsoletus) eggs. Is this relevant? For cover, Ridgway's rail seeks out emergent wetland dominated by pickleweed and cordgrass, or brackish emergent wetland with those two plants plus bulrush. Sibley and Monroe (1993, including corrections up to 1998) (v.2) For more multimedia, look at Rallus obsoletus on Wikimedia Commons. rhizophorae, nayaritensis], Râle des mangroves, R. tapageur ou R. de Californie [excl. Rallus longirostris obsoletus This was the California Clapper Rail until the species was split this summer. One handful could contain as many as 40,000 living creatures. Endangered. A member of the rail family, Rallidae, it is a chicken-sized bird that rarely flies. Loading... Unsubscribe from Sss Ccc? King Rail was split into two species, and Clapper Rail into three. 4 Rallus caerulescens (cat.) More than 500,000 images and video clips online, from tigers to turtles and elephants to sharks. Rallus obsoletus [= longirostris] yumanensis: Credit: Jim Rorabaugh/USFWS: Office Lead: Nichole Engelmann: Click here for a generalized species location map: Click on the Cactus to View the Document Title Author(s) Year File Size/Source; General Species Information Arizona Ecological Services Field Office: July 2017 : 250 Kb : 2017 Yuma Ridgway's Rail Project Evaluation Protocol. It is found principally in California's San Francisco Bay to southern Baja California. Grizzly bears, snowy egret and harbor seals fished along the windy sloughs. 1996) 9 Rallus longirostris (cat.) - Nature Picture Library rallus obsoletus Eumetazoa: pictures (20647) Eumetazoa: specimens (7100) Eumetazoa: sounds (722) Eumetazoa: maps (42) Bilateria bilaterally symmetrical animals. Rallus longirostris obsoletusRallus crepitans obsoletus. • California clapper rail (Rallus longirostris obsoletus), • Light-footed clapper rail (light-footed Ridgway's r.) (Rallus longirostris levipes) (R. obsoletus l.), • Yuma clapper rail (Yuma Ridgway's r.) (Rallus longirostris yumanensis) (R. obsoletus y.). Subspecies Rallus longirostris pelodramus. There are no common names associated with this taxon. Commission internationale pour les noms français des oiseaux (1993, révision 2009) (v.2) 1 Clapper Rail (Rallus longirostris) Conservation Concern Category: (21 subspecies; 17 within plan area) Moderate Concern Population Trend (PT) R. longirostris obsoletus—Declining (Delany and Scott 2002: del Hoyo et al. The U.S. FWS's Threatened & Endangered Species System track information about listed species in the United States It has year-long, circadian activity and is most vocal nocturnally and crepuscularly. There are more than 20,000 regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than 175 languages. Subspecies Rallus longirostris scotti. To register to myAvibase click here. 7 Rallus indicus (cat.) Rallus longirostris obsoletus Ridgway 1874. Overton, C. T. 2007. California’s three subspecies of Rallus longirostris become subspecies of Rallus obsoletus, which is given the English name Ridgway’s Rail. Wetland mud teemed with shellfish and crabs. Sibley and Monroe 2nd edition (1996) (v.2), Avibase has been visited 312,231,208 times since 24 June 2003. Pipilo crissalis eremophilus. Rallus longirostris obsoletus This was the California Clapper Rail until the species was split this summer. Rallus longirostris obsoletus (California clapper rail) Index. Clapper Rail Rallus longirostris is being split into R. longirostris, R. obsoletus and R. crepitans, following the application of criteria set out by Tobias et al. Common Names. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use. - Nature Picture Library rallus longirostris obsoletus The name changed from Gallinula mortierii since my last visit. 12 Rallus semiplumbeus (cat.) Wetland mud teemed with shellfish and crabs. Birdlife checklist version 00 (v.2) General Description. Source: Wikipedia, Order:   Gruiformes The California Clapper Rail (Rallus longirostris obsoletus) is an endangered subspecies of the Clapper Rail (R. longirostris).It is found principally in California's San Francisco Bay, and also in Monterey Bay and Morro Bay. Avibase taxonomic concepts v. 05 (Jan 2017) (v.?) The incubation period is 18 to 29 days, and the hatching success is 38%, notably less than the similar light-footed rail indigenous to southern California. Clapper Rail (Rallus longirostris) Conservation Concern Category: (21 subspecies; 17 within plan area) Moderate Concern Population Trend (PT) R. longirostris obsoletus—Declining (Delany and Scott 2002: del Hoyo et al. It is found principally in California's San Francisco Bay, and also in Monterey Bay and Morro Bay. Rallus longirostris obsoletus The California Clapper Rail is a chicken sized bird that rarely flies. Ridgway's rail (Rallus obsoletus) is a near-threatened species of bird. Birdlife checklist version 02 (v.2) Endangered. DESCRIPTION. 3 Rallus aquaticus (cat.) Subspecies Rallus longirostris obsoletus. Privacy policy, Bird checklists - taxonomy - distribution - maps - links. Rallus longirostris obsoletus (California clapper rail) Toolbox. Gruiformes . 6 Rallus elegans (cat.) 8 Rallus limicola (cat.) (Rallus longirostris obsoletus) Rail Tracks. Endemic Gallinula mortierii April 6, 2012 Thunder Chook Tasmanian nativehen (Tribonyx … 10 Rallus madagascariensis (cat.) The Clapper Rail (Rallus longirostris) is a member of the rail family, Rallidae. This species is in danger of extinction throughout all or a significant portion of its range. rhizophorae, nayaritensis] (, Rallus [longirostris, crepitans, obsoletus or wetmorei, excl. Ridgway's rail (Rallus obsoletus) is a near-threatened species of bird. (2010). By Michael Learmonth. Ginklasipika han IUCN an species komo diri gud kababarak-an. Data Summary: A Review of Literature Regarding California Clapper Rail (Rallus longirostris obsoletus) Demographics, Habitat Use, Home Range, Movements, and Effects of Disturbance. Authorities recognizing this taxonomic concept: This taxon is a subspecies of Other frequent sightings of this species around the San Francisco Bay include the Napa Sonoma Marsh, Bothin Marsh in Mill Valley, Gallinas Creek in San Rafael, Arrowhead Marsh and Damon Marsh in Oakland, the Palo Alto baylands,[6] Charleston Slough in Mountain View, Seal Slough in San Mateo and Belmont Slough. Avibase taxonomic concepts v. 04 (Aug 2016) (v.?) Dieses Stockfoto: Kalifornien Klöppel Schiene (Rallus Longirostris Obsoletus) ernähren sich von Muscheln in Gezeiten Kanal bei Ebbe, Martin Luther King Jr.. - H7X8TR aus der Alamy-Bibliothek mit Millionen von Stockfotos, Illustrationen und Vektorgrafiken in hoher Auflösung herunterladen. Datasheet. Clapper rails are secretive and difficult to observe in dense vegetation but they can be often be seen when they are crossing a tidal channel. An icon used to represent a menu that can be toggled by interacting with this icon. David C. Zeiner, William F. Laudenslayer and Kenneth E. Meyer. Before the airports, seawalls, salt-evaporation ponds and parking lots, a vast 195,000-acre green carpet blanketed the shores of the San Francisco Bay. Chordata. An icon used to represent a menu that can be toggled by interacting with this icon. Year: 1992. 1 Rallus aequatorialis (cat.) ). Rallus obsoletus [=longirostris] yumanensis: 1: 3.1: Develop and implement management plans on Federal and State-owned core habitat areas. Commission internationale pour les noms français des oiseaux (1993) (v.2) MyAvibase allows you to create and manage your own lifelists, and produce useful reports to help you plan your next birding excursion. You must be logged in to view your sighting details. (2010). 10 Rallus madagascariensis (cat.) The California Clapper Rail (Rallus longirostris obsoletus) is an obligate salt-marsh inhabitant of the tidal marshes of San Francisco Bay.The only breeding population of this subspecies is now located solely in the intertidal margins of San Francisco Bay. Genus:   Rallus, Short link:   https://avibase.ca/1D70C380, Taxonomic Serial Number: Basic Species Information STATUS. At such high tides it may also prey upon mice, and has been known to scavenge dead fish.[4]. More than 500,000 images and video clips online, from tigers to turtles and elephants to sharks. Eggs are produced in clutches of four to fourteen, with an average yield of 7.6. 2012. Biblioteca en línea. 0:34 . Rallus longirostris obsoletus (California clapper rail) Index. Volume: 23. Ridgway's rail has been observed to forage in or near relatively disturbed areas, leading one to deduce the importance of protecting even numeral marsh areas; for example this species was seen foraging in a small mudflat area within Seal Slough in San Mateo, three miles from the nearest known breeding area in Belmont.[7]. Cseremisz szótár.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Endangered Species. It is 32-47 cm (13-19 inches) from the tip of its bill to the tip of its tail. Mangrove (Fonseca) Rail Rascón de manglar Salinera Santa Alejandra, San Lorenzo, Valle, Honduras Durante el segundo Conteo Trinacional de Aves … 8 Rallus limicola (cat.) However, in 1992/1993, synoptic Mangrove, Clapper or Ridgway's Rail [excl. American Naturalist 8 (2): 111. The Yuma clapper rail (Rallus longirostris yumanensis) also known as Yuma Ridgway's rail (R. obsoletus yumanensis), is a large, gray brown to dull cinnamon rail, with a slightly down curved bill and long legs and toes relative to the body.It is one of the smaller subspecies of clapper rails. (2010). Morony, Bock and Farrand (v.2) Its name is derived from the call it makes which sounds like clapping. --Sewell.R. NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. An Rallus longirostris in nahilalakip ha genus nga Rallus, ngan familia nga Rallidae. A member of the rail family, Rallidae, it is a chicken-sized bird that rarely flies. The species has been in decline for many years and there has never been a complete survey of its population and distribution within the San Francisco Estuary. Light-footed Ridgway’s rail (Rallus longirostris levipes) is a medium sized, tawny, and graybrown colored marsh bird which inhabits coastal marshes, lagoons, and their maritime environs in southern California, United States, and northern Baja California, Mexico. Family:   Rallidae Maria Cecilia Masiero 3,020 views. Rallus longirostris obsoletus. Dixon, CA: U.S. Geological Survey. Fish and Wildlife Service: Arizona Game and Fish Department: Work type not yet selected: Labor type not yet selected: Costs are primarily for development of plans and projects. Birdlife checklist version 05 (Jun 2012) (v.2) 5 Rallus crepitans (cat.) Pages: 147-153. Subspecies Rallus longirostris waynei. Taxonomic note Rallus longirostris, R. crepitans and R. obsoletus (del Hoyo and Collar 2014) were previously lumped as R. longirostris following AOU (2000). This species is closely related to the clapper rail, and until recently was considered a subspecies. Rallus. Rails. 3 Rallus aquaticus (cat.) Subspecies recognized by Integrated Taxonomic Information System (ITIS) Taxonomic Hierarchy and GBIF classification. Birdlife checklist version 01 (v.2) Kingdom Animalia animals. 1996) R. longirostris levipes—Declining (Delany and Scott 2002: del Hoyo et al. Datasheet. It is found principally in California's San Francisco Bay to southern Baja California. Goosehead, C.M.Hogan, K.Wilson, G.W.Ball, V. Strifle et al., Don Edwards San Francisco Bay National Wildlife Refuge, L. Liu et al., "California Clapper Rail (Rallus longirostris obsoletus) Population monitoring: 2005–2011" PRBO Technical Report to the California Department of Fish and Game. rhizophorae, nayaritensis]. 1 Rallus aequatorialis (cat.) BirdNote is a two-minute radio show that combines rich sounds with engaging stories, to illustrate the amazing lives of birds and give listeners a momentary respite from the news of the day. California’s three subspecies of Rallus longirostris (Clapper Rails) recently became subspecies of Rallus obsoletus, which is given the English name Ridgway’s Rail. Rallus longirostris obsoletus . Avibase taxonomic concepts v. 02 (May 2014) (v.2) [2] It has a long, downward curving bill and is grayish brown with a pale chestnut breast and conspicuous whitish rump patch. TSN: 176209. King Rail … Sibley and Monroe (1993) (v.2) California’s three subspecies of Rallus longirostris become subspecies of Rallus obsoletus , which is given the English name Ridgway’s Rail. One of the largest population of Ridgway's rails is in San Francisco Bay, where a total of about 1100 are resident. USGS California Clapper Rail Study. California Clapper Rail (Rallus longirostris obsoletus) Population monitoring: 2005-2008 Leonard Liu, Julian Wood, Nadav Nur, Diana Stralberg, and Mark Herzog PRBO Conservation Science 3820 Cypress Drive #11, Petaluma, CA 94954 FINAL September 29, 2009 Prepared for: California Department of Fish and Game 4001 N. Wilson Way Stockton, CA 95205 . Birdlife checklist version 06.1 (Feb 2014) (v.2) It is not clear whether it requires any source of fresh water. none Rallus Linnaeus, 1758 – Greater Rails : Species: Rallus longirostris Boddaert, 1783 – Clapper Rail, Rascón picudo : Subspecies: Rallus longirostris obsoletus Ridgway, 1874 – California Clapper Rail Ridgway's Rail (Light-footed) Rallus obsoletus levipes Sss Ccc. By Michael Learmonth. Vernacular names . 11 Rallus obsoletus (cat.) The California Clapper Rail (Rallus longirostris obsoletus) is one of the most endangered species in California. Scientific: Rallus elegans obsoletus, Rallus longirostris obsoletus, Rallus obsoletus, Rallus obsoletus obsoletus Dutch: Californische Ral Norwegian Nynorsk: Spartinarikse Norwegian: spartinarikse Polish: wodnik kalifornijski Slovak: chriašteľ kalifornský Serbian: Ridžvejev petlovan Swedish: ridgwayrall Chinese: 里氏秧鸡 ... (Rallus longirostris) - Duration: 0:34. [5] The photo above right was taken of a Ridgway's rail at the San Francisco Bay perimeter near the Dumbarton Bridge; the Don Edwards San Francisco Bay National Wildlife Refuge in the area provides protected habitats for this and other native species. Ridgway’s rail is one of the largest rails. It looks like chicken with a long, slightly downward-curving bill. Ridgway's rail breeds (California rail subspecies) in the San Francisco Bay from mid-March through August, with peak activity in late June. Rallus longirostris obsoletus (California clapper rail) Toolbox. Sehen Sie sich diese Stock-Fotografie an von California Clapper Rail Rallus Longirostris Obsoletus Endangered San Francisco Bay California. Before the airports, seawalls, salt-evaporation ponds and parking lots, a vast 195,000-acre green carpet blanketed the shores of the San Francisco Bay. Clapper Rail Rallus longirostris, a bird of mainly coastal marshes, was split into three species, and King Rail Rallus elegans of the eastern U.S. was split into two. Rallus longirostris obsoletus. Birdlife checklist version 05.1 (Oct 2012) (v.2) T.E. 7 Rallus indicus (cat.) English: Ridgway's Rail. Harvey, H.S. Clapper Rail Rallus longirostris is being split into R. longirostris, R. obsoletus and R. crepitans, following the application of criteria set out by Tobias et al. Rallus Linnaeus, 1758 – Greater Rails : Species: Rallus longirostris Boddaert, 1783 – Clapper Rail, Rascón picudo : Subspecies: Rallus longirostris obsoletus Ridgway, 1874 – California Clapper Rail Although not migratory in coastal wetlands, this species disperses juveniles into freshwater wetlands in late August through October. Clapper Rail Rallus longirostris, a bird of mainly coastal marshes, was split into three species, and King Rail Rallus elegans of the eastern U.S. was split into two. Rallus obsoletus ex. It occurs solely in tidal marsh habitat and previously was found During this breeding season the bird density was approximately 0.1 to 0.6 individuals per acre; outside of breeding season densities decline to 0.04 to 0.40 individuals per acre. Its name is derived from the call it makes which sounds like clapping. Author(s): Lonzarich, David G., Thomas E. Harvey and Jean E. Takekawa. 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