Mauritius scops owl

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Mauritius scops owl
Pencil drawing of a recently killed specimen by Paul Philippe Sanguin de Jossigny, from around 1770

Extinct (ca. 1850)  (IUCN 3.1)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Otus
Species:
†O. sauzieri
Binomial name
†Otus sauzieri
(Newton & Gadow, 1893)
Location of Mauritius
Synonyms

Strix sauzieri Newton & Gadow, 1893
Scops commersoni

Oustalet
, 1896
Strix newtoni (male) Rothschild, 1907
Tyto sauzieri (female) Hachisuka, 1953
Tyto newtoni (male) Hachisuka, 1953

The

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.

Taxonomy

No descriptions of owls were recorded between the mid-17th and the late 18th century. This led to considerable confusion, especially since the bones were referred to ear tuft-less

Strix or barn owls
, whereas the image and the description unequivocally show the presence of ear tufts. Thus, it was for a long time believed that 2 or even 3 species of owls occurred on the island.

The supposed "barn owl" Tyto newtoni was described from

type specimen seems to be a bone of a larger female bird. But the bird was neither a Strix nor a barn owl. Instead, the Mascarene owls of the genus Mascarenotus were most probably members of the scops owl lineage. The Mauritius bird was the largest species of its genus, with a total length of approximately 60 cm. Its scientific name honours Théodore Sauzier
, who made the first bones available for scientific study.

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 Mauritius scops owl:[2]

Otus mirus
(Mindanao scops owl)

Otus longicornis
(Luzon scops owl)

Otus murivorus
(Rodrigues 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)

Extinction

1896 illustration by Émile Oustalet based on Jossigny's drawing
Sub-fossil remains, 1893

The Mauritius scops owl was the largest carnivore on the island prior to human settlement. Thus, unlike other local species of birds, it was not much affected by the introduction of predators such as cats, rats, and crab-eating macaques. In the 1830s, the species seems to have been not uncommonly found in the southeastern part of the island, between Souillac and the Montagnes Bambous due east of Curepipe, with the last testimony of observations referring to several encounters in 1837. However, as the cultivation of sugarcane and tea encroached upon its habitat, combined with reckless shooting, it disappeared rapidly. In 1859, Clark wrote that the bird was extinct.

References

  1. ^ BirdLife International (2012). "Mascarenotus sauzieri". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.
  2. S2CID 91541852
    .
  • Newton, Alfred & Gadow, Hans Friedrich (1893): On additional bones of the Dodo and other extinct birds of Mauritius obtained by Mr. Théodore Sauzier. Trans. Zool. Soc. 13: 281–302, plate 33: figures 11–18.
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