The hoopoe starling (Fregilupus varius), also known as the Réunion starling or the Bourbon crested starling, is a species of starling that lived on the Mascarene island of Réunion and became extinct in the 1850s. Its closest relatives were the also-extinct Rodrigues starling and the Mauritius starling from nearby islands, and the three apparently originated in Southeast Asia. The bird was first mentioned during the 17th century and was long thought to be related to the hoopoe, from which its name is derived. Some affinities have been proposed, but it was confirmed as a starling in a DNA study. The hoopoe starling was 30 cm (12 in) in length. Its plumage was primarily white and grey, with its back, wings and tail a darker brown and grey. It had a light, mobile crest, which curled forwards. The bird is thought to have been sexually dimorphic, with males larger and having more curved beaks. The juveniles were more brown than the adults. Little is known about hoopoe starling behaviour. Reportedly living in large flocks, it inhabited humid areas and marshes. The hoopoe starling was omnivorous, feeding on plant matter and insects. Its pelvis was robust, its feet and claws large, and its jaws strong, indicating that it foraged near the ground. The birds were hunted by settlers on Réunion, who also kept them as pets. Nineteen specimens exist in museums around the world. The hoopoe starling was reported to be in decline by the early 19th century and was probably extinct before the 1860s. Several factors have been proposed, including competition and predation by introduced species, disease, the deforestation of the island, and persecution by humans, who hunted it for food and as an alleged crop pest.
Taxonomy
The first account thought to mention the hoopoe starling is a 1658 list of birds of Madagascar written by French governor Étienne de Flacourt. He mentioned a black-and-grey "tivouch" or hoopoe; later authors have wondered whether this referred to the hoopoe starling or the Madagascan subspecies of the hoopoe (Upupa epops marginata), which resembles the Eurasian subspecies. The hoopoe starling was first noted on the Mascarene island of Réunion (then called "Bourbon") by Père Vachet in 1669, and first described in detail by French traveler Sieur Dubois's in 1674:
Hoopoes or 'Calandres', having a white tuft on the head, the rest of the plumage white and grey, the bill and the feet like a bird of prey; they are a little larger than the young pigeons. This is another good game [i.e., to eat] when it is fat. Early settlers on Réunion referred to the bird as "huppe", because of the similarity of its crest and curved bill with that of the hoopoe. Little was recorded about the hoopoe starling during the next 100 years, but specimens began to be brought to Europe during the 18th century. The species was first scientifically described by French naturalist Philippe Guéneau de Montbeillard in the 1779 edition of French naturalist Comte de Buffon's Histoire Naturelle, and received its scientific name from Dutch naturalist Pieter Boddaert for the book's 1783 edition. Boddaert named the bird Upupa varia; its genus name is that of the hoopoe, and its specific name means "variegated", describing its black-and-white colour.
Boddaert provided Linnean binomial names for plates in Buffon's works, so the accompanying 1770s plate of the hoopoe starling by French engraver François-Nicolas Martinet is considered the holotype or type illustration. Though the plate may have been based on a specimen in the National Museum of Natural History in Paris, this is impossible to determine today; the Paris museum originally had five hoopoe starling skins (some of which only arrived during the 19th century), one was exchanged with the Swedish Museum of Natural History, Stockholm, and two have since disappeared. The possibly female specimen MNHN 2000–756, one of the most-illustrated skins, has an artificially trimmed crest resulting in an unnaturally semi-circular shape, unlike its appearance in life; the type illustration has a similarly shaped crest. De Flacourt's "tivouch" led early writers to believe that variants of the bird were found on Madagascar and the Cape of Africa; they were thought to be hoopoes of the genus Upupa, which received names such as Upupa capensis and Upupa madagascariensis. Some authors also allied the bird with groups such as birds-of-paradise, bee-eaters, cowbirds, Icteridae, and choughs, resulting in its reassignment to other genera with new names, such as Coracia cristata and Pastor upupa. In 1831, French naturalist René-Primevère Lesson placed the bird in its own monotypic genus, Fregilipus, a composite of Upupa and Fregilus, the latter a defunct genus name of the chough. French naturalist Auguste Vinson established in 1868 that the bird was restricted to the island of Réunion and proposed a new binomial, Fregilupus borbonicus, referring to the former name of the island.
German ornithologist Hermann Schlegel first proposed in 1857 that the species belonged to the starling family, (Sturnidae), reclassifying it as part of the genus Sturnus, S. capensis. This reclassification was observed by other authors; Swedish zoologist Carl Jakob Sundevall proposed the new genus name Lophopsarus ("crested starling") in 1872, yet Fregilupus varius—the oldest name—remains the bird's binomial, and all other scientific names are synonyms. In 1874, after a detailed analysis of the only known skeleton (held at the Cambridge University Museum of Zoology), British zoologist James Murie agreed that it was a starling. English zoologist Richard Bowdler Sharpe said in 1890 that the hoopoe starling was similar to the starling genus Basilornis, but did not note any similarities other than their crests. In 1941, American ornithologist Malcolm R. Miller found the bird's musculature similar to that of the common starling (Sturnus vulgaris) after he dissected a specimen preserved in spirits at the Cambridge Museum, but noted that the tissue was very degraded and the similarity did not necessarily confirm a relationship with starlings. In 1957, American ornithologist Andrew John Berger cast doubt on the bird's affinity with starlings because of subtle anatomical differences, after dissecting a spirit specimen at the American Museum of Natural History. Some authors proposed a relationship with vangas (Vangidae), but Japanese ornithologist Hiroyuki Morioka rejected this in 1996, after a comparative study of skulls.
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