Philippine hawk-eagle | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Accipitriformes |
Family: | Accipitridae |
Genus: | Nisaetus |
Species: | N. philippensis |
Binomial name | |
Nisaetus philippensis (Gould, 1863) | |
Synonyms | |
Spizaetus philippensis |
The Philippine hawk-eagle or north Philippine hawk-eagle (Nisaetus philippensis), earlier treated under Spizaetus, [2] is a species of bird of prey in the family Accipitridae. Many taxonomists consider the Pinsker's hawk-eagle, a former subspecies, raised to full species status. [3] [4] [5] It is endemic to the Philippines. Its natural habitat is tropical moist lowland forests. It is threatened by habitat loss and trapping. [1]
The Philippine hawk-eagle is a large raptor with a dark brown upper plumage and a pale brown belly. Head and chest are streaked and the lower belly is finely barred. The species has a conspicuous backwards crest. Juveniles are paler. The call a high, screeching “week wik!” or single “week!”. [6]
It was formerly conspecific with the Pinsker's hawk-eagle but has a shorter crest, larger size,browner plummage and plain markings on the belly. This split was supported by molecular analysis.
This species is monotypic and has no subspecies.
The first comprehensive study was conducted of a nesting pair in Rizal in 2020. This nest was livestreamed daily on Facebook. This breeding pair nested in a Bombax ceiba tree in secondary forest with a territory spanning 3.3 square kilometers.
Not much information of its diet in the wild but believed to feed mostly on birds and small mammals. The nest in 2020 revealed the diet to consist of 35% birds, 32% mammals, 6% reptiles and the remaining 27% to be unknown. It perches high up in the cannopy but is mostly seen at forest edge or soaring over the forest.
Incubation took approximately 3 weeks, in the first to third week the body size doubled every week. In the 4th to 7th week, the development of the feathers and juvenile plummage was observed. Fledging took approximately two months. [7]
It inhabits primary and secondary forest, occasionally frequenting clearings and cultivations, from the lowlands to lower mountain slopes. Majority of records are below 1,000 meters above sea level. [1]
The IUCN Red List has assessed this bird as endangered with the population being estimated at 400 to 600 mature individuals remaining and still continuing to decrease. This figure is based on the estimate of a pair per 17.5 square kilometers, however, the 2020 study of a nesting pair revealed a territory of just 3.3 square kilometers and thus, this estimate may need to be revised with further study.
This species' main threat is habitat loss with wholesale clearance of forest habitats as a result of logging, agricultural conversion and mining activities occurring within the range. It is also trapped and hunted for food and the pet trade.
It occurs in a few protected areas including Mt. Makiling National Park, Mount Isarog National Park, Kalbario–Patapat Natural Park, Northern Sierra Madre Natural Park and Bataan National Park. However, as is the case for most of the Philippines protection and enforcement from logging and hunting is lax.
Conservation actions proposed include to surveys in area from which the species is known and propose formal protection. Study the species's ecology, particularly home-range size and dispersal ability to help inform a global population estimate and assess the likely impact of habitat fragmentation. Promote more effective enforcement of legislation designed to control hunting and trading. Assess forest loss in the Philippines and gauge the species's likely rate of decline and degree of fragmentation of its populations. Research hunting and trade by interviewing local people and visiting wildlife markets. [1]
The Wild Bird Club of the Philippines published a children's storybook named Bagwis. This story was inspired from same nesting pair studied in Rizal. The story is about a poacher capturing a chick and how citizens united to return this chick to its parents. This story was shown on GMA Network and is read in public events to increase awareness of this bird and to push back on poaching [8]
Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of genera, some of which are closely related. True eagles comprise the genus Aquila. Most of the 68 species of eagles are from Eurasia and Africa. Outside this area, just 14 species can be found—two in North America, nine in Central and South America, and three in Australia.
The Philippine eagle, also known as the monkey-eating eagle or great Philippine eagle, is a critically endangered species of eagle of the family Accipitridae which is endemic to forests in the Philippines. It has brown and white-colored plumage, a shaggy crest, and generally measures 86 to 102 cm in length and weighs 4.04 to 8.0 kg.
The changeable hawk-eagle(Nisaetus cirrhatus) or crested hawk-eagle is a large bird of prey species of the family Accipitridae. More informal or antiquated English common names include the marsh hawk-eagle or Indian crested hawk-eagle. It is a member of the subfamily Aquilinae, with signature feathers, absent in tropical raptors from outside this subfamily, covering the tarsus. It was formerly placed in the genus Spizaetus, but studies pointed to the group being paraphyletic resulting in the Old World members being placed in Nisaetus and separated from the New World species. It is a typical "hawk-eagle" in that it is an agile forest-dwelling predator and like many such eagles readily varies its prey selection between birds, mammals or reptiles as well as other vertebrates. Among the members of its genus, the changeable hawk-eagle stands out as the most widely distributed, adaptable and abundant species. Individuals show a wide range of variation in plumage from pale to dark, varying with moult and age giving rise to the name "changeable".
The mountain hawk-eagle or Hodgson's hawk-eagle, is a large bird of prey native to Asia. The latter name is in reference to the naturalist, Brian Houghton Hodgson, who described the species after collecting one himself in the Himalayas. A less widely recognized common English name is the feather-toed eagle. Like all eagles, it is in the family Accipitridae. Its feathered tarsus marks this species as a member of the subfamily Aquilinae. It is a confirmed breeding species in the northern part of the Indian subcontinent, from India, Nepal through Bangladesh to Thailand, Taiwan, Vietnam and Japan, although its distribution could be wider still as breeding species. Like other Asian hawk-eagles, this species was earlier treated under the genera of Spizaetus but genetic studies have shown this group to be paraphyletic, resulting in the Old World members being placed in Nisaetus and separated from the New World species. As is typical of hawk-eagles, the mountain hawk-eagle is a forest dwelling opportunistic predator who readily varies its prey selection between birds, mammals and reptiles along with other vertebrates. Although classified currently as a least-concern species due its persistence over a rather wide distribution, this species is often quite rare and scarce and seems to be decreasing, especially in response to large-scale habitat degradation and deforestation.
The rufous-bellied eagle or rufous-bellied hawk-eagle is a bird of prey in the family Accipitridae that is found in the forested regions of tropical Asia. Relatively small for eagles and contrastingly patterned like a falcon, this species was earlier placed in the genus Hieraaetus and sometimes also in the genus Aquila but thought to be distinctive enough to belong to a separate genus.
The Luzon bleeding-heart, bleeding-heart dove, bleeding-heart pigeon or punay is a species of ground dove in the genus Gallicolumba, known as "bleeding-hearts" due to their distinctive red patch on its chest. It was also known as paloma de punalada 'stabbed pigeon' but is nowadays more commonly referred to as just punalada. The Luzon bleeding-heart is the species in which the "blood" feature is most pronounced, while the Mindanao bleeding-heart does have a larger red patch, the Luzon bleeding-heart has a reddish hue extending down the belly, furthering the illusion of a blood stain. It is threatened by habitat loss and hunting for the pet trade and for meat.
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The Philippine eagle-owl is a vulnerable species of owl belonging to the family Strigidae. It is endemic to the Philippines, where it is found in lowland forests on the islands of Catanduanes, Samar, Bohol, Mindanao, Luzon, Leyte and possibly Sibuyan. While it is the largest owl in the Philippines, it is relatively small compared to other members of its genus. It is a vulnerable species with its population on the decline. Its main threats are habitat destruction, hunting and poaching for the pet trade.
Spizaetus is the typical hawk-eagle birds of prey genus found in the tropics of the Americas. It was however used to indicate a group of tropical eagles that included species occurring in southern and southeastern Asia and one representative of this genus in the rainforests of West Africa. The Old World species have been separated into the genus Nisaetus. Several species have a prominent head crest. These are medium to large-sized raptors, most being between 55 and 75 cm long, and tend to be long-tailed and slender.
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The rufous hornbill, also known as the Philippine hornbill and locally as kalaw, is a large species of hornbill endemic to the Philippines. They are referred by locals as the "clock-of-the-mountains" due to its large booming call which typically occur of every hour. It occurs in moist tropical lowland forest. They are now considered to be a threatened species and its reasons for decline being habitat destruction, hunting and poaching for the illegal pet trade.
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Cassin's hawk-eagle or Cassin's eagle, is a relatively small eagle in the family Accipitridae. Its feathered legs mark it as member of the Aquilinae or booted eagle subfamily. A forest-dependent species, it occurs in primary rainforests across western, central and (marginally) eastern Africa where it preys on birds and tree squirrels. It was named after John Cassin who first described it in 1865. Due to widespread habitat destruction, its populations are steadily declining but have not yet warranted upgrading its status from Least Concern.
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