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| == Description == | == Description == | ||
| Sakalava rail measures 19 cm with grey underparts, a yellow bill and red eyes.<ref name="iucn status 11 November 2021" /> This rail species exhibits some evidence of ] of different body size and colors. Males are smaller, thinner, have rufous |
Sakalava rail measures 19 cm with grey underparts, a yellow bill and red eyes.<ref name="iucn status 11 November 2021" /> This rail species exhibits some evidence of ] of different body size and colors. Males are smaller, thinner, have rufous-brown upperparts and bright red shanks.<ref name=":2">{{Cite book|last=Rabenandrasana|first=Marc|title=Conservation biology of Sakalava rail Amaurornis olivieri an Endangered Malagasy water bird and public awareness in Besalampy wetlands complex, Western Madagascar|publisher=Ligue Malgache pour la Protection des Oiseaux|year=February 2007|location=Antananarivo, Madagascar}}</ref> Females are larger, have brown-green upperparts and pale pink shanks. Juvenile and immature Sakalava rails look very similar to females.<ref name=":2" /> ] Although 34 ] loci which are ] molecular markers were produced for this species, additional research is needed to confirm sexual dimorphism using DNA or voice analysis.<ref name=":2" /><ref>{{Cite journal|last=Brede|first=Edward G.|last2=Long|first2=Peter|last3=Zefania|first3=Sama|last4=Rabenandrasana|first4=Marc|last5=Székely|first5=Tamás|last6=Bruford|first6=Michael|date=2010-02-13|title=PCR primers for microsatellite loci in a Madagascan waterbird, the Sakalava Rail (Amaurornis olivieri)|url=http://dx.doi.org/10.1007/s12686-010-9189-2|journal=Conservation Genetics Resources|volume=2|issue=S1|pages=273–277|doi=10.1007/s12686-010-9189-2|issn=1877-7252}}</ref> | ||
| == Habitat == | == Habitat == | ||
| Line 25: | Line 25: | ||
| == Distribution == | == Distribution == | ||
| Sakalava rail has a restricted distribution in Madagascar due to a small and fragmented population.<ref name=":0">{{Cite journal|last=Pruvot|first=Yverlin Z|last2=René de Roland|first2=Lily-Arison|last3=Razafimanjato|first3=Gilbert|last4=Rakotondratsima|first4=Marius PH|last5=Andrianarimisa|first5=Aristide|last6=Thorstrom|first6=Russell|date=2018-04-03|title=Nesting biology and food habits of the endangered Sakalava Rail Amaurornis olivieri in the Mandrozo Protected Area, western Madagascar|url=https://www.tandfonline.com/doi/full/10.2989/00306525.2017.1317296|journal=Ostrich|language=en|volume=89|issue=2|pages=109–115|doi=10.2989/00306525.2017.1317296|issn=0030-6525}}</ref> This rail species has been historically recorded between the ] in the north and the ] in the south.<ref name=":2" /> Its population was estimated at 215 individuals with |
Sakalava rail has a restricted distribution in Madagascar due to a small and fragmented population.<ref name=":0">{{Cite journal|last=Pruvot|first=Yverlin Z|last2=René de Roland|first2=Lily-Arison|last3=Razafimanjato|first3=Gilbert|last4=Rakotondratsima|first4=Marius PH|last5=Andrianarimisa|first5=Aristide|last6=Thorstrom|first6=Russell|date=2018-04-03|title=Nesting biology and food habits of the endangered Sakalava Rail Amaurornis olivieri in the Mandrozo Protected Area, western Madagascar|url=https://www.tandfonline.com/doi/full/10.2989/00306525.2017.1317296|journal=Ostrich|language=en|volume=89|issue=2|pages=109–115|doi=10.2989/00306525.2017.1317296|issn=0030-6525}}</ref> This rail species has been historically recorded between the ] in the north and the ] in the south.<ref name=":2" /> Its population was estimated at 215 individuals with the largest single population of 62 birds following surveys conducted in 2003-2006.<ref name=":1" /> During this study, Sakalava rails were located at five locations: ], Ampandra, Amparihy, Sahapy and Mandrozo.<ref name=":1" /> In 2016, the IUCN Red List estimated that the population ranges between 250 and 999 mature individuals. Although few observations have been made, the species is suggested to have a declining population.<ref name="iucn status 11 November 2021" /> | ||
| == Behavior and Ecology == | == Behavior and Ecology == | ||
| Sakalava rails are found alone or in pairs. They walk slowly over floating vegetation and turn ferns with their bills to catch prey when feeding.<ref name=":1" /> When scared, they run and briefly fly to hide into deep vegetation. They are commonly predated by ] (''Milvus aegyptius)'' and ] (''Centropus toulou)''.<ref name=":1" /> | Sakalava rails are found alone or in pairs. They walk slowly over floating vegetation and turn ferns with their bills to catch prey when feeding.<ref name=":1" /> When scared, they run and briefly fly to hide into deep vegetation. They are commonly predated by ] (''Milvus aegyptius)'' and ] (''Centropus toulou)''.<ref name=":1" /> | ||
| The Sakalava rail’s peak ] lasts from September to November, but there is some evidence that this rail species could have a longer breeding period lasting year |
The Sakalava rail’s peak ] lasts from September to November, but there is some evidence that this rail species could have a longer breeding period lasting year-round.<ref name=":0" /> Some active nests and young Sakalava rails have been observed during the wet season in February and March.<ref name=":1" /> | ||
| Both sexes participate in parental care activities during the breeding season: from building the nest, incubating the eggs, and feeding the chicks.<ref name=":0" /> No evidence of ] by helpers |
Both sexes participate in parental care activities during the breeding season: from building the nest, incubating the eggs, and feeding the chicks.<ref name=":0" /> No evidence of ] by helpers has been observed for the Sakalava rail.<ref name=":0" /> | ||
| === Vocalizations === | === Vocalizations === | ||
| Sakalava rail performs many ]. They emit a “tic–tic” or “tic-tic-tic huaw” call while flicking their tail. They also simultaneously communicate with their partner by vocalizing a “truwruru” every 4 to 6 seconds while motionless.<ref name=":1" /> Before mating, both |
Sakalava rail performs many ]. They emit a “tic–tic” or “tic-tic-tic huaw” call while flicking their tail. They also simultaneously communicate with their partner by vocalizing a “truwruru” every 4 to 6 seconds while motionless.<ref name=":1" /> Before mating, both males and females stand side-by-side and simultaneously emit a loud “prourourou”.<ref name=":0" /> Chicks can also call a loud “kiouw” every 3 to 5 seconds.<ref name=":1" /> | ||
| === Diet === | === Diet === | ||
| Line 43: | Line 43: | ||
| The male Sakalava 4ail has to perform an elaborate ] in order to mate. First, the male leads and presents to the female possible nest sites while calling loudly. The male vocalizes to invite the female to visit the site.<ref name=":0" /> Then, the male would carry material and begin building a nest. When the female approves of the site, she would immediately assist in constructing the nest.<ref name=":0" /> If she did not find the site suitable, she would not assist in nest construction, which would cause the male to move to another site and repeat this courtship behavior until a suitable nesting site is found.<ref name=":0" /> | The male Sakalava 4ail has to perform an elaborate ] in order to mate. First, the male leads and presents to the female possible nest sites while calling loudly. The male vocalizes to invite the female to visit the site.<ref name=":0" /> Then, the male would carry material and begin building a nest. When the female approves of the site, she would immediately assist in constructing the nest.<ref name=":0" /> If she did not find the site suitable, she would not assist in nest construction, which would cause the male to move to another site and repeat this courtship behavior until a suitable nesting site is found.<ref name=":0" /> | ||
| A breeding pair of Sakalava rail builds a new nest every breeding season. Both sexes participate in building the nest and they usually complete the construction in 3 days.<ref name=":0" /> The nest |
A breeding pair of Sakalava rail builds a new nest every breeding season. Both sexes participate in building the nest and they usually complete the construction in 3 days.<ref name=":0" /> The nest is made of dead ''Phragmites'' reeds and is situated 50 to 70 cm above the water.<ref name=":0" /> The nest can be built on floating vegetation or inside a deep tunnel of leaves.<ref name=":0" /> | ||
| Both female and male Sakalava rail incubate the eggs. The ] period usually lasts 16 days and ] occurs from July to September.<ref name=":0" /> The ] is 2 or 3 eggs of pale cream color with brown spots.<ref name=":1" /><ref name=":0" /> Both sexes feed the downy black chicks until they reach 40 days of age.<ref name=":0" /> The adults then stop providing food and start chasing the ] chicks out of the nest. At 45 days old, the chicks are completely independent and leave the nest.<ref name=":0" /> | Both female and male Sakalava rail incubate the eggs. The ] period usually lasts 16 days and ] occurs from July to September.<ref name=":0" /> The ] is 2 or 3 eggs of pale cream color with brown spots.<ref name=":1" /><ref name=":0" /> Both sexes feed the downy black chicks until they reach 40 days of age.<ref name=":0" /> The adults then stop providing food and start chasing the ] chicks out of the nest. At 45 days old, the chicks are completely independent and leave the nest.<ref name=":0" /> | ||
| === Threats === | === Threats === | ||
Revision as of 00:07, 13 November 2021
Species of bird
| Sakalava rail | |
|---|---|
| Conservation status | |
 Endangered (IUCN 3.1) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Gruiformes |
| Family: | Rallidae |
| Genus: | Zapornia |
| Species: | Z. olivieri |
| Binomial name | |
| Zapornia olivieri (G. Grandidier & Berlioz, 1929) | |
| |
| Distribution of the Sakalava rail | |
| Synonyms | |
|
Amaurornis olivieri (Grandidier & Berlioz, 1929) | |
The Sakalava rail (Zapornia olivieri) is a species of bird in the family Rallidae. It is endemic to western Madagascar. This bird is small with brown upperpart feathers, grey underparts, a yellow bill and red legs.
The habitat of this rail species is freshwater marshes of reed Phragmites mauritianus. It is classified as Endangered and is threatened by habitat loss due to the destruction of wetlands in Madagascar.
Description
Sakalava rail measures 19 cm with grey underparts, a yellow bill and red eyes. This rail species exhibits some evidence of sexual dimorphism of different body size and colors. Males are smaller, thinner, have rufous-brown upperparts and bright red shanks. Females are larger, have brown-green upperparts and pale pink shanks. Juvenile and immature Sakalava rails look very similar to females. ] Although 34 microsatellite loci which are polymorphic molecular markers were produced for this species, additional research is needed to confirm sexual dimorphism using DNA or voice analysis.
Habitat
Sakalava rail lives in marshes of open water and dense reedbeds of Phragmites mauritianus. These lotic marshes also contain many floating plant species such as native ferns (Salvinia), water lilies (Nymphaea lotus and Nymphaea nouchali) and invasive water hyacinths (Eichhornia crassipes).
Distribution
Sakalava rail has a restricted distribution in Madagascar due to a small and fragmented population. This rail species has been historically recorded between the Mahavavy river in the north and the Mangoky river in the south. Its population was estimated at 215 individuals with the largest single population of 62 birds following surveys conducted in 2003-2006. During this study, Sakalava rails were located at five locations: Lake Kinkony, Ampandra, Amparihy, Sahapy and Mandrozo. In 2016, the IUCN Red List estimated that the population ranges between 250 and 999 mature individuals. Although few observations have been made, the species is suggested to have a declining population.
Behavior and Ecology
Sakalava rails are found alone or in pairs. They walk slowly over floating vegetation and turn ferns with their bills to catch prey when feeding. When scared, they run and briefly fly to hide into deep vegetation. They are commonly predated by Yellow-billed kite (Milvus aegyptius) and Madagascar coucal (Centropus toulou).
The Sakalava rail’s peak breeding period lasts from September to November, but there is some evidence that this rail species could have a longer breeding period lasting year-round. Some active nests and young Sakalava rails have been observed during the wet season in February and March.
Both sexes participate in parental care activities during the breeding season: from building the nest, incubating the eggs, and feeding the chicks. No evidence of cooperative breeding by helpers has been observed for the Sakalava rail.
Vocalizations
Sakalava rail performs many bird vocalizations. They emit a “tic–tic” or “tic-tic-tic huaw” call while flicking their tail. They also simultaneously communicate with their partner by vocalizing a “truwruru” every 4 to 6 seconds while motionless. Before mating, both males and females stand side-by-side and simultaneously emit a loud “prourourou”. Chicks can also call a loud “kiouw” every 3 to 5 seconds.
Diet
More than half of Sakalava rail’s diet is composed of spiders, while the remaining portion is made up of insects, crustaceans and molluscs found under floating vegetation.
Reproduction
The male Sakalava 4ail has to perform an elaborate courtship display in order to mate. First, the male leads and presents to the female possible nest sites while calling loudly. The male vocalizes to invite the female to visit the site. Then, the male would carry material and begin building a nest. When the female approves of the site, she would immediately assist in constructing the nest. If she did not find the site suitable, she would not assist in nest construction, which would cause the male to move to another site and repeat this courtship behavior until a suitable nesting site is found.
A breeding pair of Sakalava rail builds a new nest every breeding season. Both sexes participate in building the nest and they usually complete the construction in 3 days. The nest is made of dead Phragmites reeds and is situated 50 to 70 cm above the water. The nest can be built on floating vegetation or inside a deep tunnel of leaves.
Both female and male Sakalava rail incubate the eggs. The egg incubation period usually lasts 16 days and egg-laying occurs from July to September. The clutch size is 2 or 3 eggs of pale cream color with brown spots. Both sexes feed the downy black chicks until they reach 40 days of age. The adults then stop providing food and start chasing the precocial chicks out of the nest. At 45 days old, the chicks are completely independent and leave the nest.
Threats
Sakalava rail is classified as Endangered by the IUCN Red List due to the degradation of wetlands in Madagascar. Habitat loss is a major threat to this rail species when the shores of marshes where Sakalava rails nest are converted into rice fields. Also, human disturbance degrades the habitat of Sakalava rails when local populations burn and collect Phragmites reeds. Indeed, the surface area occupied by reeds has decreased by 80% between 1949 and 2008 due to increased turbidity from erosion. These wetlands of western Madagascar are also home to five other threatened bird species: Madagascar fish eagle (Haliaeetus vociferoides), Madagascar heron (Ardea humbloti), Madagascar sacred ibis (Threskiornis bernieri), Madagascar teal (Anas bernieri) and the Madagascar plover (Charadrius thoracicus). Conservation actions such as creating protected areas are underway to preserve these ecosystems and their rare bird species.
References
- ^ BirdLife International (2016). "Zapornia olivieri". IUCN Red List of Threatened Species. 2016: e.T22692654A93363104. doi:10.2305/IUCN.UK.2016-3.RLTS.T22692654A93363104.en. Retrieved 11 November 2021.
- ^ Rabenandrasana, Marc; Zefania, Sama; Long, Peter; The Seing, Sam; Clémentine Virginie, Marie; Randrianarisoa, Mihaja; Safford, Roger; Székely, Tamas (March 2009). "Distribution, habitat and status of 'Endangered' Sakalava Rail of Madagascar". Bird Conservation International. 19 (1): 23–32. doi:10.1017/S0959270908008058. ISSN 0959-2709.
- ^ Rabenandrasana, Marc (February 2007). Conservation biology of Sakalava rail Amaurornis olivieri an Endangered Malagasy water bird and public awareness in Besalampy wetlands complex, Western Madagascar. Antananarivo, Madagascar: Ligue Malgache pour la Protection des Oiseaux.
{{cite book}}: CS1 maint: year (link) - Brede, Edward G.; Long, Peter; Zefania, Sama; Rabenandrasana, Marc; Székely, Tamás; Bruford, Michael (2010-02-13). "PCR primers for microsatellite loci in a Madagascan waterbird, the Sakalava Rail (Amaurornis olivieri)". Conservation Genetics Resources. 2 (S1): 273–277. doi:10.1007/s12686-010-9189-2. ISSN 1877-7252.
- ^ Pruvot, Yverlin Z; René de Roland, Lily-Arison; Razafimanjato, Gilbert; Rakotondratsima, Marius PH; Andrianarimisa, Aristide; Thorstrom, Russell (2018-04-03). "Nesting biology and food habits of the endangered Sakalava Rail Amaurornis olivieri in the Mandrozo Protected Area, western Madagascar". Ostrich. 89 (2): 109–115. doi:10.2989/00306525.2017.1317296. ISSN 0030-6525.
- Andriamasimanana, R (2011-07-19). "Analyses de la dégradation du lac Kinkony pour la conservation du Complexe des Zones Humides Mahavavy - Kinkony, Région Boeny, Madagascar". Madagascar Conservation & Development. 6 (1). doi:10.4314/mcd.v6i1.68061. ISSN 1662-2510.
- Young, H. Glyn; Young, R. P.; Razafindrajao, F.; Aboudou, Abdallah Iahia Bin; Fa, J. E. (2014). "Patterns of waterbird diversity in central western Madagascar: where are the priority sites for conservation?". Wildfowl. 64 (64): 35–53. ISSN 2052-6458.
External links
- BirdLife Species Factsheet.
- https://www.iucnredlist.org/
- https://ebird.org/species/sakrai1?siteLanguage=fr_CA
- https://www.africanbirdclub.org/countries/madagascar
| Taxon identifiers | |
|---|---|
| Amaurornis olivieri | |