Rodrigues scops owl

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Rodrigues scops owl
Mascarenotus murivorus.jpg
Fossils
Status iucn3.1 EX.svg
Extinct  (mid-18th century)  (IUCN 3.1) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Otus
Species:
O. murivorus
Binomial name
Otus murivorus
Synonyms

Strix murivora Milne-Edwards, 1873
Carine murivora Günther & E. Newton, 1879
Bubo leguati(female) Rothschild, 1907
Athene murivora(male) Rothschild, 1907
Mascarenotus murivorus Milne-Edwards, 1873

Contents

The Rodrigues scops owl (Otus murivorus), also known as Rodrigues owl, Rodrigues lizard owl, Leguat's owl, or (somewhat misleadingly) Rodrigues little owl, was a small owl. It lived on the Mascarene island of Rodrigues, but it is nowadays extinct. It is part of the three Mascarene owls, formerly classified in the genus Mascarenotus, although they are now classified in the genus Otus . [2] Like many of the Mascarene land-birds, the genus was a distinct relative to South-East Asian taxa, in this case apparently being a descendant of the direct ancestor of the Oriental scops owl. [3] This insular scops owl had evolved gigantism, becoming twice as large and four times heavier than its continental ancestor. [4]

Taxonomy

Leg bones Rodrigues owl leg bones.jpg
Leg bones

It is sometimes assumed that Leguat mentioned this bird in his 1708 memoir, but this seems to be in error; Julien Tafforet gave a good description in 1726, however. The Rodrigues bird, which Tafforet compared to the petit-duc, the Eurasian scops owl (and not, as often assumed to the little owl, the chouette chevêche), was more arboreal than its congeners and fed on small birds and "lizards" (small specimens of the Rodrigues day gecko and the Rodrigues giant day gecko). A monotonous call was given in good weather.

Considering the bird's likely relationships as evidenced by the subfossil bones discovered later, and the detailed description of the related Mauritius scops owl, the Rodriguez bird was as large as a good-sized Australian boobook, with females reaching the size of a long-eared owl, and had ear tufts like an Otus owl and nearly naked legs.

In the original description, Milne-Edwards referred the bones to a Strix owl, mistakenly assuming that Tafforet had described a species of the tuftless owl genera. One larger tibiotarsus was assigned by him to the same sort of bird, but not described further. Günther & E. Newton, in their discussion of additional bones, quite logically assigned this bone to a female of this species, given that the small size of the island seems to preclude two competing similar species of owl to coexist. Rothschild, however, described the larger bone as type of what he assumed was a miniature eagle owl, Bubo leguati. It is nowadays accepted that the assignment to sex by Günther & Newton was correct.

In 2018, a DNA study by Louchart and colleagues found that the Mascarenotus owls grouped among species of Otus (the scops owls), and therefore belonged to that genus. The cladogram below shows the placement of the Rodrigues owl: [5]

Otus mirus (Mindanao scops owl)

Otus longicornis (Luzon scops owl)

Otus murivorus (Rodrigues scops owl)

Otus capnodes (Anjouan scops owl)

Otus moheliensis (Moheli scops owl)

Otus mayottensis (Mayotte scops owl)

Otus insularis (Seychelles scops owl)

Otus sunia (oriental scops owl)

Otus sauzieri (Mauritius scops owl)

Otus pauliani (Karthala scops owl)

Otus rutilus madagascariensis (Torotoroka scops owl)

Otus rutilus rutilus (Rainforest scops owl)

Description

Tafforet's description of the bird reads as follows:

A bird is seen which is very like the brown owl, and which eats the little birds and small lizards. They live almost always in the trees; and when they think the weather fine, they utter at night always the same cry. On the other hand, when they find the weather bad they are not heard. [6]

Extinction

Regardless of whether Leguat mentioned owls, Tafforet's record is the last reference to this bird. It probably was unable to cope with the ecological alterations and the predation which resulted from the human settlement and the large rat population.

The bird became apparently extinct in the mid-18th century; as Rodrigues is quite a small island, it is likely that Pingré would have recorded them in 1761 if they had still been present.

Related Research Articles

<span class="mw-page-title-main">Newton's parakeet</span> Extinct parrot from the island Rodrigues

Newton's parakeet, also known as the Rodrigues parakeet or Rodrigues ring-necked parakeet, is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues in the western Indian Ocean. Several of its features diverged from related species, indicating long-term isolation on Rodrigues and subsequent adaptation. The rose-ringed parakeet of the same genus is a close relative and probable ancestor. Newton's parakeet may itself have been ancestral to the endemic parakeets of nearby Mauritius and Réunion.

<span class="mw-page-title-main">Rodrigues solitaire</span> Extinct, flightless bird that was endemic to Rodrigues

The Rodrigues solitaire is an extinct flightless bird that was endemic to the island of Rodrigues, east of Madagascar in the Indian Ocean. Genetically within the family of pigeons and doves, it was most closely related to the also extinct dodo of the nearby island Mauritius, the two forming the subfamily Raphinae. The Nicobar pigeon is their closest living genetic relative.

<span class="mw-page-title-main">Scops owl</span> Genus of birds

Scops owls are typical owls in family Strigidae belonging to the genus Otus and are restricted to the Old World. Otus is the largest genus of owls with 59 species. Scops owls are colored in various brownish hues, sometimes with a lighter underside and/or face, which helps to camouflage them against the bark of trees. Some are polymorphic, occurring in a greyish- and a reddish-brown morph. They are small and agile, with both sexes being compact in size and shape. Female scops owls are usually larger than males.

<span class="mw-page-title-main">François Leguat</span>

François Leguat was a French explorer and naturalist. He was one of a small group of male French Protestant refugees who in 1691 settled on the then uninhabited island of Rodrigues in the western Indian Ocean. The colonists became discontented with their life on the island and after a stay of two years managed to escape to Mauritius in a small boat. Leguat arrived back in Europe in June 1698 and wrote a book recounting his adventures which was published in 1708. In his book Leguat describes several species of birds and tortoises that were endemic to Rodrigues but are now extinct.

This article is one of a series providing information about endemism among birds in the world's various zoogeographic zones. For an overview of this subject see Endemism in birds.

<span class="mw-page-title-main">Rodrigues night heron</span> Extinct species of bird

The Rodrigues night heron is an extinct species of heron that was endemic to the Mascarene island of Rodrigues in the Indian Ocean. The species was first mentioned as "bitterns" in two accounts from 1691–1693 and 1725–1726, and these were correlated with subfossil remains found and described in the latter part of the 19th century. The bones showed that the bird was a heron, first named Ardea megacephala in 1873, but moved to the night heron genus Nycticorax in 1879 after more remains were described. The specific name megacephala is Greek for "great-headed". Two related extinct species from the other Mascarene islands have also been identified from accounts and remains: the Mauritius night heron and the Réunion night heron.

<span class="mw-page-title-main">Rodrigues rail</span> Extinct bird of the rail family that was endemic to Rodrigues

The Rodrigues rail, also known as Leguat's gelinote or Leguat's rail, is an extinct species of the rail family that was endemic to the Mascarene island of Rodrigues. The bird was first documented from life by two accounts from 1691–93 and 1725–26. Subfossil remains were later discovered and correlated with the old accounts in 1874, and the species was named E. leguati in Leguat's honour. It is generally kept in its own genus, Erythromachus, but has sometimes been assigned to the genus Aphanapteryx along with its close relative the red rail of Mauritius; their relationship with other rails is unclear.

<span class="mw-page-title-main">Red rail</span> Extinct species of flightless rail which was endemic to Mauritius

The red rail is an extinct species of rail that was endemic to the Mascarene island of Mauritius, east of Madagascar in the Indian Ocean. It had a close relative on Rodrigues island, the likewise extinct Rodrigues rail, with which it is sometimes considered congeneric, but their relationship with other rails is unclear. Rails often evolve flightlessness when adapting to isolated islands, free of mammalian predators, and that was also the case for this species. The red rail was a little larger than a chicken and had reddish, hairlike plumage, with dark legs and a long, curved beak. The wings were small, and its legs were slender for a bird of its size. It was similar to the Rodrigues rail, but was larger, and had proportionally shorter wings. It has been compared to a kiwi or a limpkin in appearance and behaviour.

<span class="mw-page-title-main">Mauritius sheldgoose</span> Extinct species of bird

The Mauritius sheldgoose, also known as the Mauritius shelduck, is an extinct species of sheldgoose that was endemic to the island of Mauritius. While geese were mentioned by visitors to Mauritius in the 17th century, few details were provided by these accounts. In 1893, a carpometacarpus wing-bone and a pelvis from the Mare aux Songes swamp were used to name a new species of comb duck, Sarcidiornis mauritianus. These bones were connected to the contemporary accounts of geese and later determined to belong to a species related to the Egyptian goose and placed in the sheldgoose genus Alopochen. The Mauritius and Réunion sheldgoose may have descended from Egyptian geese that colonised the Mascarene islands.

<span class="mw-page-title-main">Mascarene teal</span> Extinct species of bird

The Mascarene Teal, also known as Sauzier's Teal and Mauritian Duck, is an extinct dabbling duck that formerly occurred on the islands of Mauritius and Réunion.

<span class="mw-page-title-main">Mascarene coot</span> Extinct species of bird

The Mascarene coot is an extinct species of coot that inhabited the Mascarene islands of Mauritius and Réunion. Long known from subfossil bones found in the Mare aux Songes swamp on the former island, but only assumed from descriptions to also have been present on the latter, remains have more recently been found on Réunion also. Early travellers' reports from Mauritius were, in reverse, generally assumed to refer to common moorhens, but it seems that this species only colonized the island after the extinction of the endemic coot.

<span class="mw-page-title-main">Rodrigues parrot</span> Extinct species of parrot that was endemic to Rodrigues

The Rodrigues parrot or Leguat's parrot is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues. The species is known from subfossil bones and from mentions in contemporary accounts. It is unclear to which other species it is most closely related, but it is classified as a member of the tribe Psittaculini, along with other Mascarene parrots. The Rodrigues parrot bore similarities to the broad-billed parrot of Mauritius, and may have been related. Two additional species have been assigned to its genus, based on descriptions of parrots from the other Mascarene islands, but their identities and validity have been debated.

The Réunion scops owl, also known as the Réunion owl or Réunion lizard owl, was a small owl that occurred on the Mascarene island of Réunion, but became extinct before any living birds were described; it is only known from subfossil bones. One of the three Mascarene owls, it was formerly classified in the genus Mascarenotus, and most likely was similar to a long-eared owl in size and appearance, but with nearly naked legs. However, according to recent studies, it and its relatives belong to the genus Otus, and is likely descended from the Otus sunia lineage.

<span class="mw-page-title-main">Mauritius scops owl</span> Extinct species of owl

The extinct Mauritius scops owl, also known as Mauritius owl, Mauritius lizard owl, Commerson's owl, Sauzier's owl, or Newton's owl, was endemic to the Mascarene island of Mauritius. It is known from a collection of subfossil bones from the Mare aux Songes swamp, a detailed sketch made by de Jossigny in 1770, a no less detailed description by Desjardins of a bird shot in 1836, and a number of brief reports about owls, the first being those of Van Westzanen in 1602 and Matelief in 1606.

The Réunion kestrel is an extinct bird of prey which belongs to the falcon family. It was endemic to the Mascarene island of Réunion and was part of the Western Indian Ocean radiation of kestrels.

<span class="mw-page-title-main">Mascarene owls</span> Extinct genus of birds

The Mascarene owls, also known as Mascarene scops owls or lizard owls, are a group of owls formerly classified in their own genus Mascarenotus, but now thought to represent a polyphyletic grouping within the genus Otus. They were restricted to the Mascarene Islands in the Indian Ocean. All three species, the Réunion scops owl, Mauritius scops owl, and Rodrigues scops owl, are now extinct.

<span class="mw-page-title-main">Rodrigues starling</span> Extinct species of bird that was endemic to Rodrigues

The Rodrigues starling is an extinct species of starling that was endemic to the Mascarene island of Rodrigues. Its closest relatives were the Mauritius starling and the hoopoe starling from nearby islands; all three are extinct and appear to be of Southeast Asian origin. The bird was only reported by French sailor Julien Tafforet, who was marooned on the island from 1725 to 1726. Tafforet observed it on the offshore islet of Île Gombrani. Subfossil remains found on the mainland were described in 1879, and were suggested to belong to the bird mentioned by Tafforet. There was much confusion about the bird and its taxonomic relations throughout the 20th century.

<span class="mw-page-title-main">Mascarene grey parakeet</span> Extinct parrot from Mauritius and Réunion

The Mascarene grey parakeet, Mauritius grey parrot, or Thirioux's grey parrot, is an extinct species of parrot which was endemic to the Mascarene Islands of Mauritius and Réunion in the western Indian Ocean. It has been classified as a member of the tribe Psittaculini, along with other parrots from the Islands.

<span class="mw-page-title-main">Julian P. Hume</span>

Julian Pender Hume is an English palaeontologist, artist and writer who lives in Wickham, Hampshire. He was born in Ashford, Kent, and grew up in Portsmouth, England.

References

  1. BirdLife International (2012). "Mascarenotus murivorus". IUCN Red List of Threatened Species . 2012. Retrieved 26 November 2013.
  2. IOC World Bird List 11.1 (Report). doi: 10.14344/ioc.ml.11.1 .
  3. "Ancient DNA reveals the origins, colonization histories and evolutionary pathways of two recently extinct species of giant scops owl from Mauritius and Rodrigues Islands (Mascarene Islands, southwestern Indian Ocean) | Request PDF". ResearchGate. Retrieved 2018-11-25.
  4. Duhamel, A. et al. (2020) Cranial evolution in the extinct Rodrigues Island owl Otus murivorus (Strigidae), associated with unexpected ecological adaptations. Scientific Reports, 10:14019.
  5. Louchart, Antoine; Bastian, Fabiola; Baptista, Marilia; Guarino-Vignon, Perle; Hume, Julian P.; Jacot-des-Combes, Cécile; Mourer-Chauviré, Cécile; Hänni, Catherine; Ollivier, Morgane (2018). "Ancient DNA reveals the origins, colonization histories, and evolutionary pathways of two recently extinct species of giant scops owl from Mauritius and Rodrigues Islands (Mascarene Islands, south-western Indian Ocean)". Journal of Biogeography. 45 (12): 2678–2689. doi:10.1111/jbi.13450. S2CID   91541852.
  6. Le Guat, François; Oliver, Samuel Pasfield (1891). The voyage of François Leguat of Bresse, to Rodriguez, Mauritius, Java, and the Cape of Good Hope / transcribed from the first English edition ; edited and annotated by Captain Pasfield Oliver. Vol. 2. doi: 10.5962/bhl.title.46034 .