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The paint-billed crake (''Mustelirallus erythrops'') is a
species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
of bird in the subfamily Rallinae of the rail, crake, and coot family
Rallidae Rails (avian family Rallidae) are a large, Cosmopolitan distribution, cosmopolitan family (biology), family of small- to medium-sized terrestrial and/or semi-amphibious birds. The family exhibits considerable diversity in its forms, and includes ...
.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip retrieved August 7, 2022 It is found in
Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as Maritime bo ...
,
Panama Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and ...
, every mainland South American country except
Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...
and
Uruguay Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...
, and the
Galápagos Islands The Galápagos Islands () are an archipelago of volcanic islands in the Eastern Pacific, located around the equator, west of the mainland of South America. They form the Galápagos Province of the Republic of Ecuador, with a population of sli ...
.Garrigues, Richard., P. Camacho-Varela, M. Montoya, P. O'Donnell, J. Zook. OFFICIAL LIST OF BIRDS OF COSTA RICA 2020-2021 https://listaoficialavesdecostarica.files.wordpress.com/2021/07/aocr-lista-oficial-aves-de-cr-2020-2021-act.julio_.21-1.xlsx retrieved October 12, 2022Chesser, R. T., S. M. Billerman, K. J. Burns, C. Cicero, J. L. Dunn, B. E. Hernández-Baños, R. A. Jiménez, A. W. Kratter, N. A. Mason, P. C. Rasmussen, J. V. Remsen, Jr., D. F. Stotz, and K. Winker. 2022. Check-list of North American Birds (online). American Ornithological Society. https://checklist.aou.org/taxaRemsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022


Taxonomy and systematics

The paint-billed crake was initially placed in genus ''Porzana'' and later moved to genus ''Neocrex'' to join the
Colombian crake The Colombian crake (''Mustelirallus colombianus'') is a species of bird in the subfamily Rallinae of the rail, crake, and coot family Rallidae. It is found in Colombia, Ecuador, and Panama.HBW and BirdLife International (2021) Handbook of the ...
(''N. colombiana''). The two have been sometimes been considered
conspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organism ...
. In 2015 the South American Classification Committee of the
American Ornithological Society The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its ...
(AOS) and the
Clements taxonomy ''The Clements Checklist of Birds of the World'' is a book by Jim Clements which presents a list of the bird species of the world. The most recent printed version is the sixth edition (2007), but has been updated yearly, the last version in 202 ...
moved both species to genus ''Mustelirallus''. In 2023 the
International Ornithological Committee The International Ornithologists' Union (IOU) is an international organization for the promotion of ornithology. It links basic and applied research and nurtures education and outreach activities. Specifically, the IOU organizes and funds global co ...
(IOC) moved them to genus ''Mustelirallus''. However, the North American Classification Committee of AOS (NACC), and
BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding i ...
's ''
Handbook of the Birds of the World The ''Handbook of the Birds of the World'' (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. ...
'' (HBW) retain them in ''Neocrex''.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved July 24, 2022Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 25, 2021 This article uses the IOC/NACC/HBW genus. The IOC, HBW, and Clements agree that the paint-billed crake has two subspecies, the
nominate Nomination is part of the process of selecting a candidate for either election to a public office, or the bestowing of an honor or award. A collection of nominees narrowed from the full list of candidates is a short list. Political office In th ...
''N. e. erythrops'' and ''N. e. olivascens''.


Description

The paint-billed crake is long and weighs about .Taylor, B., A. Bonan, P. F. D. Boesman, and C. J. Sharpe (2020). Paint-billed Crake (''Mustelirallus erythrops''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.pabcra.01 retrieved October 12, 2022 One specimen had a wing of , a tarsus of , and weighed . The species gets its common name from its red and yellow bill; it has bright red legs. The sexes are alike. The nominate subspecies has a brown crown, nape, and upperparts including the tail. Its throat is white and its face, throat, and breast are gray. Its flanks, belly, and vent are barred black and white. ''N. e. olivascens'' is similar but darker and with less white on its throat.


Distribution and habitat

The nominate subspecies of paint-billed crake is found in coastal
Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...
, coastal
Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...
, and the Galápagos Islands. Subspecies ''N. e. olivascens'' is much more widespread, but is found in several widely separated areas. In Central America it is found in Costa Rica and Panama. On the South American mainland it is found in
Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...
,
Bolivia Bolivia, officially the Plurinational State of Bolivia, is a landlocked country located in central South America. The country features diverse geography, including vast Amazonian plains, tropical lowlands, mountains, the Gran Chaco Province, w ...
,
Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
,
Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...
,
French Guiana French Guiana, or Guyane in French, is an Overseas departments and regions of France, overseas department and region of France located on the northern coast of South America in the Guianas and the West Indies. Bordered by Suriname to the west ...
,
Guyana Guyana, officially the Co-operative Republic of Guyana, is a country on the northern coast of South America, part of the historic British West Indies. entry "Guyana" Georgetown, Guyana, Georgetown is the capital of Guyana and is also the co ...
,
Paraguay Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...
,
Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...
,
Suriname Suriname, officially the Republic of Suriname, is a country in northern South America, also considered as part of the Caribbean and the West Indies. It is a developing country with a Human Development Index, high level of human development; i ...
, and
Venezuela Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...
. It has been recorded as a
vagrant Vagrancy is the condition of wandering homelessness without regular employment or income. Vagrants usually live in poverty and support themselves by travelling while engaging in begging, scavenging, or petty theft. In Western countries, ...
on
Trinidad Trinidad is the larger, more populous island of the Republic of Trinidad and Tobago, the country. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is the southernmost island in ...
and in the
U.S. The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous ...
states of
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
and
Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...
. The species inhabits a wide variety of landscapes, from the very wet like reedbeds and marshes, to wet and dry pastures and rice fields, fairly dry bushy areas, and (in the Galápagos) humid woodlands. In South America it seems partial to swamp and savanna habitats with much grass and thickets. In elevation it ranges from near sea level to almost


Behavior


Movement

There is no evidence that the paint-billed crake makes regular movements. However, it has been found many times far outside its normal range, so it is at least prone to vagrancy and might have migratory populations. It does not respond to playback.


Feeding

Little is known about the paint-billed crake's feeding habits or diet. It is known to eat invertebrates including
Diplopoda Millipedes (originating from the Latin , "thousand", and , "foot") are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derive ...
and
Coleoptera Beetles are insects that form the Taxonomic rank, order Coleoptera (), in the superorder Holometabola. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 40 ...
and also seeds. It forages in soil, leaf litter, and standing water, and at dawn and dusk has been noted feeding in open areas next to dense vegetation.


Breeding

The paint-billed crake's breeding season varies widely across its range. It builds a bowl nest of green grass on or near the ground and at least partially hidden in grass. It lays a
clutch A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does th ...
of three to seven eggs; they are creamy buff and have large reddish blotches near the blunt end. The incubation period is at least 23 to 25 days.


Vocalization

The paint-billed crake's song is "a long, gradually accelerating series of up to 36 staccato somewhat yelping 'kjek' notes". Its calls include "frog-like, guttural, buzzy, single notes", "a mellow soft purring", and "a sharp 'twack'".


Status

The
IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...
has assessed the paint-billed crake as being of Least Concern. It has a very large range but its population size and trend are unknown. No immediate threats have been identified. The species is "very furtive and difficult to observe" so its abundance and even its exact range limits are hard to determine. Its "status and distribution need investigation, as do movements and breeding".


References


External links

*Associação Mãe-da-lu
Paint-billed crake (Mustelirallus erythrops)
- Photos and notes {{Taxonbar, from=Q1274289
paint-billed crake The paint-billed crake (''Mustelirallus erythrops'') is a species of bird in the subfamily Rallinae of the rail, crake, and coot family Rallidae.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International ...
Birds of Colombia Birds of Venezuela Birds of the Guiana Shield Birds of Peru Birds of Bolivia Birds of Paraguay Birds of Brazil Birds of the Caatinga Birds of the Atlantic Forest Birds of the Caribbean Birds of Trinidad and Tobago Galápagos Islands coastal fauna
paint-billed crake The paint-billed crake (''Mustelirallus erythrops'') is a species of bird in the subfamily Rallinae of the rail, crake, and coot family Rallidae.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International ...
paint-billed crake The paint-billed crake (''Mustelirallus erythrops'') is a species of bird in the subfamily Rallinae of the rail, crake, and coot family Rallidae.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International ...
Taxonomy articles created by Polbot Neocrex