Mindoro island thrush

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Mindoro island thrush
Naturalis Biodiversity Center - RMNH.AVES.146367 1 - Turdus poliocephalus mindorensis Ogilvie-Grant, 1896 - Turdidae - bird skin specimen.jpeg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Turdidae
Genus: Turdus
Species:
T. mindorensis
Binomial name
Turdus mindorensis

The Mindoro island thrush (Turdus mindorensis), is a species of passerine in the family Turdidae. It is endemic to Mindoro in the Philippines. Its habitat is tropical moist montane forest above 1,200 meters above sea level. Prior to 2024, it was considered a subspecies of Island thrush.

Contents

Description and taxonomy

EBird describes this as "Little-known thrush endemic to the Philippine island of Mindoro, where it is restricted to montane forest generally above 1200 meters. Handsomely patterned, with a gray head, black back and tail, and dark rufous sides. Also note bright orange bill, eyering, legs, and feet. Behavior poorly known, but likely forages at all levels of forest, much like other Island thrushes. Vocalizations obscure; other island thrushes in the Philippines give beautiful songs consisting of warbles and trills, as well as explosive rattles and chup notes." [1]

The Mindoro island thrush was first described by Scottish ornithologist William Robert Ogilvie-Grant in 1896. [2] It was later considered to be a subspecies of Island thrush. Following a 2023 phylogenic study, the island thrush complex was split into 17 different species by the IOC and Clements checklist. Based on this, it was discovered that among all species, the Mindoro island thrush was the most genetically divergent. [3] [4] [5]

This species is monotypic and has no subspecies. [6]

Ecology and behavior

This is a newly split species and there are no specific studies yet for the Mindoro island thrush and even among the Philippine island thrushes this is one of the least known with just one known photo. The Island thrush species complex has a varied and generalist diet taking a range of invertebrates such as insects including beetles, spiders, snails, earthworms, as well as carrion and even small reptiles. It will also take fruit and seeds, depending on what is locally available. It is observed foraging on leaf litter and low branches in dense cover, clearings and even roads.

Breeding season is believed to be April to May but birds with enlarged gonads have been collected from February to October. The island thrush species complex makes cup shaped nests of grass, roots, tendrils, twigs, bark and moss. These nests are typically placed low and close to a clearing. Clutch size is 1 to 3 eggs but is usually 2. Eggs are greenish blue with brown spots. Incubation takes 18 days and fledgling takes 17 to 19 days. [7]

Habitat and conservation status

It occurs in tropical moist montane forest and forest edges above altitudes of 1,200 m. It is mainly seen in Podocarpus forest.

This is a newly split species and has yet to be assessed by the International Union for Conservation of Nature. This bird is believed to be common in its habitat. However, like all other forest species in the Philippines, its population is still likely on the decline. Most of the other Mindoro endemic birds are listed as threatened but compared to its lowland counterparts, this montane specialist's mountain habitat has remained relatively intact. Despite this, encroachment from illegal logging, settlers and land conversion still occurs.

It occurs in a few protected areas like Mounts Iglit–Baco Natural Park and Mount Halcon however, actual protection from deforestation and hunting is lax. [8]

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References

  1. ↑ "Mindoro Island-Thrush - eBird". ebird.org. Retrieved 2024-10-23.
  2. ↑ "Mindoro Island-Thrush". Avibase. Retrieved 20 October 2024.
  3. ↑ Reeve, Andrew Hart; Gower, Graham; Pujolar, José Martín; Smith, Brian Tilston (January 2023). "Population genomics of the island thrush elucidates one of earth's great archipelagic radiations". Evolution Letters. 7 (1). Retrieved 20 October 2024.
  4. ↑ "2024 Taxonomy Update—COMING SOON". eBird. Retrieved 20 October 2024.
  5. ↑ "Proposed Splits/Lumps". IOC World Bird List v14.2. Retrieved 20 October 2024.
  6. ↑ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2024). "Thrushes". IOC World Bird List Version 14.2. International Ornithologists' Union. Retrieved 26 September 2024.
  7. ↑ Collar, Nigel; Christie, David; Kirwan, Guy M. (2024). "Luzon Island-Thrush (Turdus thomassoni), version 1.0". Birds of the World. doi:10.2173/bow.islthr36.01. ISSN   2771-3105.
  8. ↑ Collar, Nigel; Christie, David; Kirwan, Guy M. (2024). "Mindoro Island-Thrush (Turdus mindorensis), version 1.0". Birds of the World. doi:10.2173/bow.islthr22.01. ISSN   2771-3105.
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