Plumbeous forest falcon | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Falconiformes |
Family: | Falconidae |
Genus: | Micrastur |
Species: | M. plumbeus |
Binomial name | |
Micrastur plumbeus Sclater, WL, 1918 | |
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The plumbeous forest-falcon (Micrastur plumbeus) is a bird of prey in the family Falconidae only found in the Chocó region in Colombia and Ecuador. This rare bird has not been often spotted, which makes its study complicated. For a long time, it was considered to be part of the lined forest-falcons but it now known to be a species of its own. [2] It is currently considered a vulnerable species because of the precarity of its habitat that is threatened by deforestation. [3]
The adult plumbeous forest-falcon has a grey back and a grey head with very bright orange legs and face. Their breast is barred and paler than their back, and their belly is more whitish towards the tail. This raptor has a black tail with a white tip and a white band in the middle, going across the whole width. Their irides are dark brown. The individuals are 30-34 cm (13 in) long and females are bigger than males. [4] As a matter of fact, females weigh 180-213g and males weigh 172-188g. [2]
Immature individuals look similar besides a whiter breast [4] and beige-ish irides, clearer than in mature individuals. [5]
Forest-falcons usually have long tails and round wings, but the plumbeous forest-falcon has a shorter tail and long wings. [6]
For some time, it had been debated whether the plumbeous forest-falcon was a lined forest-falcon (Micrastur gilvicollis) or a subspecies of the latter because of their resemblance. [2] As it turned out, these birds were two different species. Their territorial distributions are completely separate.
M. plumbeus and M. ruficollis interestes live in the same environment but do not interbreed, or even interfere with each other. They are sympatric and syntonic. [5] The plumbeous forest-falcon differentiated about 3 million years ago after the split between trans- and cis-Andean South American populations. [7] The closure of the Panama seaway, due to a drier and cooler climate linked to the formation of ice sheets at higher latitudes, may have highly contributed to the isolation of the plumbeous forest-falcon. [8]
Forest-falcons are part of the sub-family Herpetotherinae. This clade's and Polyborinae's species are usually found in forests and wetlands. [9]
The plumbeous forest-falcon is endemic to the south of the Chocó region in South America. This region extends in the south-west of Colombia and the north-west of Ecuador. This bird lives all-year long in forest lowlands and foothill forests; it is not a migratory bird. The elevation of its habitat varies from the sea level to approximately 1500m of altitude. [2] One research project studying a few pairs of this species found that their territory extended over 35-40 ha. [5]
This species has been classified as vulnerable by the IUCN because of habitat loss. [2] Deforestation is touching more territories and the plumbeous forest-falcon's habitat is being destructed. It is an unprotected species that needs to be studied more extensively to help its conservation. [3] Efforts should be focused on the Chocó area where this organism is solely contained. [8]
Two main types of vocalizations are known for this bird. They produce some yapping kew notes every 1.5 - 2.5s, as well as series of cah cah cah-cah-cah that may be sung by pairs. [2] Three types of calls and songs are known for the forest falcons. The most common one is the "territorial advising song". The plumbeous forest-falcon repeat series of five notes to claim his territory. Furthermore, the "excited cackling call" and the "quacking song" are also heard from Micrastur species, even though less often then the first call. Two members of the same species sometimes sing in a pair. [5]
Due to the lack of study, the diet of this forest-falcon is not perfectly known. However, it is most probable that it is an opportunistic predator feeding on small vertebrates and large invertebrates. Land crabs, birds and lizards were found in the digestive system of a few individuals. [2] Its main source of food is thought to be lizards. [5] Moreover, this family of birds prey on forest-dwelling birds and rodents. [6]
They have two principal ways to forage. With the first one, they remain on the ground while running after the prey that they eventually catch with their feet. They keep their tail high when they chase the prey. The second technique consists of being perched about 2m above the ground, looking for sounds and movements in the leaf litter and then jumping on the detected prey. [5]
The plumbeous forest-falcon's reproduction is not really known but it probably sets up its nests in tree cavities. [2] As a matter of fact, other members of the Micrastur family that have been more studied, such as the collared forest-falcon and the barred forest-falcon, nest in trees. [10]
The falcons and caracaras are around 65 species of diurnal birds of prey that make up the family Falconidae. The family likely originated in South America during the Paleocene and is divided into three subfamilies: Herpetotherinae, which includes the laughing falcon and forest falcons; Polyborinae, which includes the spot-winged falconet and the caracaras; and Falconinae, the falcons and kestrels (Falco) and falconets (Microhierax).
Forest falcons are members of the genus Micrastur, part of the family Falconidae. They are endemic to the Americas, found from Mexico in the north, south through Central America and large parts of South America, and as far south as northern Argentina. Most are restricted to humid tropical and subtropical forests, but the two most widespread species, the collared and the barred forest falcon, also range into drier and more open habitats.
The red-necked falcon is a bird of prey in the falcon family with two disjunct populations, one in India and the other in Africa. This medium-sized falcon has bluish grey wings and upper body, a chestnut red cap with short chin straps passing through the eye. The primary feathers of the wing are black and a single black band at the tip of the tail are distinctive. The Indian subspecies Falco chicquera chicquera also known as the red-headed merlin or red-headed falcon is found mainly in the open plains of the India Subcontinent although it is thought to have occurred further west in southeastern Iran. The subspecies Falco chicquera ruficollis found in sub-Saharan Africa is sometimes treated as a full species, the rufous-necked falcon, on the basis of its well-separated geographic range and distinctive pattern. It appears very similar to the Indian form but has dark barring on the upperparts, a rufous breast band, and black moustachial and eye stripes. As in most falcons, the females are larger and falconers in India called the female turumti and the male as chatwa. They hunt in pairs mostly at dawn and dusk, capturing small birds, bats and squirrels.
The bat falcon is a bird of prey in the family Falconidae, the falcons and caracaras. It is found in Mexico, Central America, Trinidad, and every mainland South American country except Chile and Uruguay.
The plumbeous kite is a bird of prey in the family Accipitridae that is resident in much of northern South America. It is migratory in the northern part of its range which extends north to Mexico. It feeds on insects which it catches either from a perch or while in flight.
The aplomado falcon is a medium-sized falcon of the Americas. The species' largest continuous range is in South America, but not in the deep interior Amazon Basin. It was long known as Falco fusco-coerulescens or Falco fuscocaerulescens, but these names are now believed to refer to the bat falcon. Its resemblance in shape to the hobbies accounts for its old name orange-chested hobby. Aplomado is an unusual Spanish word for "lead-colored", referring to the blue-grey areas of the plumage – an approximate English translation would be "plumbeous falcon". Spanish names for the species include halcón aplomado and halcón fajado ; in Brazil it is known as falcão-de-coleira.
The grey kestrel is an African bird of prey belonging to the falcon family Falconidae. Its closest relatives are the banded kestrel and Dickinson's kestrel and the three are sometimes placed in the subgenus Dissodectes.
The bicolored hawk is a species of bird of prey in the family Accipitridae. It is found in forest, woodland, second growth, plantations, and wooded savanna in southeastern Mexico, Central America, and northern and central South America. Though generally uncommon, it is the most common species of Accipiter in most of its range, but it does not occur at altitudes above 2,700 metres (8,900 ft) such as the highest parts of the Andes.
The black caracara is a species of bird of prey in the family Falconidae found in Amazonian and French Guiana lowlands, commonly along rivers. They are locally referred to as Ger' futu busikaka in the Republic of Suriname or juápipi {nẽjõmbʌ} by the Emberá of Panama and Colombia. Both these names refer to multiple bird species within Falconidae. German-Brazilian ornithologist Helmut Sick also referred to this species as gavião-de-anta, literally translating to "tapir-hawk".
Buckley's forest falcon, also called lesser collared forest-falcon and Traylor's forest-falcon, is a species of bird of prey in subfamily Herpetotherinae of family Falconidae, the falcons and caracaras. It is found in Bolivia, Brazil, Eucador, Peru, and possibly Colombia and Venezuela.
The lined forest falcon is a species of bird of prey in subfamily Herpetotherinae of family Falconidae, the falcons and caracaras. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.
The cryptic forest falcon is a species of bird of prey in the family Falconidae. It is found in the southeastern Amazon rainforest in Brazil and Bolivia. While uncommon in its Amazonian range, it remains widespread and is therefore rated as least concern by BirdLife International and IUCN. Unlike the lined forest falcon, with which it has long been confused in a cryptic species complex, adult cryptic forest falcons only have a single white tail-band.
The slaty-backed forest falcon is a species of bird of prey in subfamily Herpetotherinae of family Falconidae, the falcons and caracaras. It is found in Costa Rica, Panama, and every mainland South American country except Argentina, Chile, Paraguay, and Uruguay.
The barred forest falcon is a species of bird of prey in subfamily Herpetotherinae of family Falconidae, the falcons and caracaras. It occurs from southern Mexico south through most of Central America and in every mainland South American country except Chile and Uruguay.
The collared forest falcon is a species of bird of prey in the family Falconidae. It is the largest member of the Micrastur genus and a common inhabitant of tropical rainforests in Latin America. Hiding in the dense forest canopy, they are a secretive bird often only recognized by their distinctive call. With a morphology or body type allowing them to be agile in their forested habitat, their diet comprises a wide variety of prey from smaller frogs to adult turkeys (2.7-3.2 kg).
The Philippine falconet is a species of bird of prey in the family Falconidae, genus Microhierax. It is endemic to the lowland forests of Philippines, and can often be seen near open forest edges hunting flying insects. Philippine falconets nest in woodpecker holes of dead trees, and can be seen fairly commonly within their suitable habitats. Although the Philippine falconet population is declining due to habitat loss, it is still evaluated as "Least Concern" globally.
The pied falconet, is a species of bird of prey in the family Falconidae. It is found in Bangladesh, Bhutan, China, Hong Kong, India, Laos, and Vietnam. Its natural habitat is temperate forests.
The white-throated caracara or Darwin's caracara is a species of bird of prey in the family Falconidae, the falcons and caracaras. It is found in Argentina and Chile.
The white-rumped falcon is a species of bird of prey in the family Falconidae native to Indochina. It is placed in its own monotypic genus, Neohierax.
Herpetotherinae is a subfamily of falconid birds of prey that includes eight species in two genera Herpetotheres and Micrastur. Both genera are found in South America and the subfamily is basal to the other falconid subfamilies where they split off around 30.2 million years ago in the Oligocene epoch. The two extant herpetotherine genera split around 20 million years ago in the Miocene epoch with the extinct genus Thegornis.
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