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Biology

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The Seychelles magpie robin feeds on a variety of invertebrates such as earthworms, centipedes and small scorpions, although fruit and vegetables, or small vertebrates, may also be taken (2). They forage for prey along the ground and frequently trail after large animals such as pigs and giant tortoises (Geochelone gigantea), which disturb the ground (5). Nests are found in the crowns of coconut trees or in holes in the trunks of large trees (2). A single egg is laid each year (3), and they are known to breed year round (2). Chicks are only capable of flying strongly a month after hatching, and until this time remain in thick, low vegetation calling loudly and insistently to their parents (5).
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Conservation

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Since 1990, Birdlife International has operated a Seychelles Magpie Robin Recovery Programme and the RSPB joined this effort in 1998 (6). Birds have been introduced to small, predator-free islands and a predator eradication programme is being initiated on Frégate Island (2). Breeding success has been boosted through a number of measures such as the creation of habitat and supplementary feeding, and a genetic study is currently underway to investigate inbreeding (2). Although the population remains Endangered, the Seychelles Magpie-robin Recovery Programme is still on course to achieve its goal of a population of 200 individuals, spread over 7 islands by the year 2006 (2).
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Description

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This species is about the size of a European blackbird (3) and is black in colour with a blue sheen and white patches on the wing (4). Unusually for magpie robins, males and females are similar in appearance (3). Juveniles have ginger flecks in the wing patches and lack the blue sheen of the adults (4).
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Habitat

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This species historically occupied mature coastal forest but is now found in more central woodlands, as well as plantations and vegetable gardens (2).
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Range

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Endemic to the Seychelles and formerly widespread on at least six islands, the magpie robin was reduced to just 12 to 15 birds on Frégate Island in 1965 (2). Following a prolonged recovery programme birds can now be found on Frégate, Cousin, Cousine and Aride Islands (2).
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Status

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Classified as Endangered (EN) on the IUCN Red List 2007 (1).
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Threats

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This bird has been affected by habitat loss and degradation following the colonisation of the Seychelles by humans (3). In addition, predation by introduced species such as cats and brown rats (Rattus norvegicus), and competition with the introduced common myna (Acridotheres tristis) may have also been responsible for the dramatic decline in the magpie robin (2). At present, the very low population size means that the species is extremely vulnerable both to chance events and to the problems associated with inbreeding.
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Seychelles magpie-robin

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The Seychelles magpie-robin (Copsychus sechellarum) is a medium-sized endangered bird from the granitic Seychelles in the Indian Ocean.

This species of magpie-robin is approximately 25 cm (9.8 in) in length. With a body mass of 65 g (2.3 oz) in females and 76 g (2.7 oz) in males, this species may stand as the largest remnant species in the diverse Muscicapidae with the separation of larger birds such as cochoas to the thrush family.[3] It has a glossy coal-black plumage with a white-colored bar on each wing. It is considered a long-lived species, whose lifespan is over 15 years of age. Its habitat is woodlands, plantations and the vicinity of gardens. Their range on the island of Fregate was limited by the area of open ground with leaf litter.[4]

Historically, it is believed to have existed on most of the granitic Seychelles islands. Destruction of habitat and introduced predators (domestic cats and rats) greatly reduced its numbers. By 1970, it was on the brink of extinction, with only 16 individuals remaining, all on Frégate Island. Over the next two decades it had managed to stave off extinction, but its population in 1990 was still only 21 individuals. In 1990 BirdLife International began preservation efforts to save the Seychelles magpie-robin. Birds were transferred to Cousin in 1994 and to Cousine in 1995.[4] Further transfers followed to Aride Island in 2002 and Denis Island in 2008.

Today, there are established populations of Seychelles magpie-robins on all five islands. As of 2012, the total population was 244-248 birds (Frégate- 115), (Cousin- 38), (Cousine- 31), (Aride- 24), (Denis- 36-40) and the IUCN has downlisted its status from Critically Endangered to Endangered.[1] However, a recent genetic study reported extremely low genetic diversity across the islands, calling for continued genetic monitoring of the populations.[5]

It is printed over the latest 25 Seychelles rupee bank notes, a 2016 series of bank notes all about local birds.

References

  1. ^ a b BirdLife International (2017). "Copsychus sechellarum". IUCN Red List of Threatened Species. 2017: e.T22709978A111061160. doi:10.2305/IUCN.UK.2017-1.RLTS.T22709978A111061160.en. Retrieved 12 November 2021.
  2. ^ Newton, A. (1865). On an apparently undescribed bird from the Seychelles Islands. Ibis, 1:331-7.
  3. ^ Dunning, John B. Jr., ed. (2008). CRC Handbook of Avian Body Masses (2nd ed.). CRC Press. ISBN 978-1-4200-6444-5.
  4. ^ a b Watson, J ; C. Warman; D. Todd & Victorin Laboudallon (1992) The Seychelles Magpie Robin Copsychus sechellarum: ecology and conservation of an endangered species. Biological Conservation 61:93-106
  5. ^ Cavill, Emily L.; Gopalakrishnan, Shyam; Puetz, Lara C.; Ribeiro, Ângela M.; Mak, Sarah S. T.; da Fonseca, Rute R.; Pacheco, George; Dunlop, Bronwyn; Accouche, Wilna; Shah, Nirmal; Zora, Anna; Calabrese, Licia; Genner, Martin; Jones, Gareth; Guo, Chunxue (April 2022). "Conservation genomics of the endangered Seychelles Magpie‐Robin ( Copsychus sechellarum ): a unique insight into the history of a precious endemic bird". Ibis. 164 (2): 396–410. doi:10.1111/ibi.13023. ISSN 0019-1019.

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Seychelles magpie-robin: Brief Summary

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The Seychelles magpie-robin (Copsychus sechellarum) is a medium-sized endangered bird from the granitic Seychelles in the Indian Ocean.

This species of magpie-robin is approximately 25 cm (9.8 in) in length. With a body mass of 65 g (2.3 oz) in females and 76 g (2.7 oz) in males, this species may stand as the largest remnant species in the diverse Muscicapidae with the separation of larger birds such as cochoas to the thrush family. It has a glossy coal-black plumage with a white-colored bar on each wing. It is considered a long-lived species, whose lifespan is over 15 years of age. Its habitat is woodlands, plantations and the vicinity of gardens. Their range on the island of Fregate was limited by the area of open ground with leaf litter.

Historically, it is believed to have existed on most of the granitic Seychelles islands. Destruction of habitat and introduced predators (domestic cats and rats) greatly reduced its numbers. By 1970, it was on the brink of extinction, with only 16 individuals remaining, all on Frégate Island. Over the next two decades it had managed to stave off extinction, but its population in 1990 was still only 21 individuals. In 1990 BirdLife International began preservation efforts to save the Seychelles magpie-robin. Birds were transferred to Cousin in 1994 and to Cousine in 1995. Further transfers followed to Aride Island in 2002 and Denis Island in 2008.

Today, there are established populations of Seychelles magpie-robins on all five islands. As of 2012, the total population was 244-248 birds (Frégate- 115), (Cousin- 38), (Cousine- 31), (Aride- 24), (Denis- 36-40) and the IUCN has downlisted its status from Critically Endangered to Endangered. However, a recent genetic study reported extremely low genetic diversity across the islands, calling for continued genetic monitoring of the populations.

It is printed over the latest 25 Seychelles rupee bank notes, a 2016 series of bank notes all about local birds.

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