Eclectus | |
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A pair of Papuan eclectus parrots (Eclectus polychloros) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Psittaciformes |
Family: | Psittaculidae |
Tribe: | Psittaculini |
Genus: | Eclectus Wagler, 1832 |
Type species | |
Psittacus grandis [1] Gmelin, 1788 | |
Species | |
4 extant, 1 extinct (see text) |
Eclectus is a genus of parrot, the Psittaciformes, which consists of four known extant species known as eclectus parrots and the extinct Eclectus infectus , the oceanic eclectus parrot. The extant eclectus parrots are medium-sized parrots native to regions of Oceania, particularly New Guinea and Australia. Males are mostly bright green, females are predominantly bright red. The male and female eclectus were once thought to be different species. The conservation status of the remaining species is least concern. [2] Eclectus parrots do well in captivity, and are a very popular pet across the world.
The eclectus parrots are the most sexually dimorphic of all the parrot species. The contrast between the brilliant emerald green plumage of the male and the deep red/purple plumage of the female is so marked that the birds were, until the early 20th century, considered to be different species. Eclectus parrots generally have a big head and a short tail, and are striking in their coloration. They measure about 35–42 cm (14–17 in) in length. [2] They unusually exhibit reverse sexual dichromatism, a form of sexual dimorphism where the two sexes have differential coloration. Males are mostly green, with bright red underwings, blue primaries, and a yellow beak, while females are a striking red with a royal blue underbelly and black beak. [3]
Usually when birds exhibit reversed sexual dimorphism, it comes with a sex role reversal, in which the males who usually gather food are left to incubate eggs, while the female forages. It is important to note that in the eclectus, no such sex role reversal occurs. The male still forages, while the female incubates the eggs. Research has shown this dimorphism with no role reversal is a product of the rare nest hollows, and the selective pressures that accompany this. [4] [5]
It is thought that sexual selection has affected these birds in this way in order to provide camouflage for the male, while making the female a beacon, which is not what is usually seen in sexually dimorphic birds. [4] Good nesting sites are rare to come by, so the female's bright coloration alerts other males to females with hollows in the area, with whom they can then mate. It also serves as a signal to other females that the nesting site is occupied. The male is primarily responsible for obtaining food for the female and chicks, so his green coloration provides adequate camouflage from predators, such as peregrine falcons, while he is in the rainforest canopy in search of food. The male also has UV coloration in his feathers, which allows him to appear extra radiant to females, who are able to visualize the UV spectrum, yet remain camouflaged to predators who cannot. This unique coloration is evidence of an evolutionary compromise between the need to attract and compete for mates, and the risk of predation. [4] [5]
The reported lifespan of Eclectus sp. varies widely, from ~20 years to more than 60 years. This range is largely due to their relatively recent popularity in aviculture, with many individuals in captivity having not yet reached their natural lifespan. Many owners of eclectus parrots have reported ages upwards of 45 years, noting their birds show no obvious signs of age-related health decline.
The genus was named by Johann Georg Wagler in 1832. The epithet derives from eklektos, the ancient Greek cum Latin term for 'chosen one'; Wagler acknowledges the Latin in a publication later the same year. [6]
There are five species presently recognized in this genus: [7] [8] [9]
Prior to 2023, all extant forms were classified as a single species, the eclectus parrot (E. roratus). The eclectus parrot was split into four species by the IOC in 2023; this had previously been done by the IUCN and BirdLife International. [7] [9] [10] The oceanic eclectus is thought to be from the Late Pleistocene to the Holocene Epoch, and was found in Vanuatu, Fiji, and on the Tonga Archipelago. It became extinct around 3,000 years ago as a result of human settlement in these areas during that time. [2]
Females of the Papuan (or red-sided), Solomon Island, Australian, Aru Island, and Biaki eclectus all display a blue eye ring, blue breast, and do not have yellow in their plumage. The grand eclectus and Vosmaer's eclectus both lack the blue eye ring, and have a purple breast. Both the Tanimbar Island and Sumba Island eclectus are completely red, but the Sumba Island eclectus is larger than the Tanimbar, while the Tanimbar has yellow on its tail. The Australian eclectus is the largest of all the subspecies, at 37 cm (15 in). [11]
The eclectus parrot is endemic to rainforests from New Guinea to the Solomon Islands, and the tip of the Cape York Peninsula of Australia. On the peninsula, they are restricted to rainforest patches in the Iron and McIllwraith ranges. [3] Though geographically, the areas of Papua New Guinea and Australia where these parrots live seem relatively close together, these parrots do not fly enough to be able to cross the 70 miles between the peninsula and mainland Papua New Guinea. As such, it is thought that they expanded from Papua New Guinea into Australia around 10,000 years ago, when the two were connected by a land bridge. They prefer to stay in the canopy level of the rainforests, and can nest anywhere from 20 to 30 meters (66 to 98 ft) above the ground. Breeding hollows lower than this height tend to flood easily in the rainforest climate, and are generally avoided if possible. [3] [12]
Eclectus parrots have a varied range of calls, from a loud, high-pitched squawk to whistles and screeches. [2] They have also been observed to make a chime-like call when a male returns to the nest with food, in what seems to be a show of gratitude or an acknowledgement of return. [13]
In the wild, eclectus parrots primarily feed on various fruits and their pulp. However, they will also feed on seeds, leaf buds, blossoms, nectar, figs, and nuts. They are frequently found to be eating the pulp of the fruit of Salacia chinensis (lolly berry) and Leea indica (bandicoot berry), and the seeds of Dodonaea lanceolata . These items are of high nutritional value to the birds. [13]
These parrots eat intermittently, in order to increase food storage capacity and process meals as quickly and efficiently as possible. They have special adaptations in their digestive system to help them with this. Their esophagus is wide and flexible, to allow the fast passage of food and rapid digestion, and their proventriculus (glandular region between the crop and gizzard) is elongated and highly distensible, allowing it to hold comparable amounts of food as the crop. Eclectus parrots can produce the fat they do not get from their diet endogenously in their liver, from hexose sugars found in the fruit pulp they eat. [13]
After securing a good nesting hollow, females generally never leave the nest unless threatened, so the males are primarily responsible for feeding the female and her chicks. They have been observed to travel long distances in search of food, some over a 30 km2 (12 sq mi) range. The males usually feed the female in the mornings and the afternoons, and generally stick to a strict and regulated feeding schedule. [13]
As stated previously, eclectus parrots nest in hollow cavities 20 to 30 meters above the ground. Optimal nesting hollows are relatively rare within the eclectus' habitat, and can be very difficult to find. [12] As such, females tend to monopolize good nesting hollows once found, staying there up to 11 months a year, and returning to the same nest at times for multiple years. Females have been known to fight off other females, sometimes to the death, to defend their nesting hollows. Males have been known to travel unusually large distances to mate with females, the longest found being 7.2 kilometers (4.5 miles). [3]
Eclectus parrots are unusual among parrots because they exhibit both polyandrous mating (females mate with multiple males) and polygynandrous mating (males mate with multiple females and females mate with multiple males). [3] Even more unusual, these birds exhibit a form of polyandry known as cooperative polyandry, [14] in which multiple males breed with a single female, and all the males work together to help the female raise the chicks, rather than compete with each other. They are the only parrot known to do this. Females will lay two eggs per clutch, but often only fledge one young. [15]
Eclectus are also unusual in that they can bias the sex of their offspring, such that they can manipulate whether their offspring are male or female. [15] It is thought that this behavior occurs as a result of the scarcity of their nesting hollows. [12] [3] As such, females will only have male offspring when resources are plentiful, a good nesting hollow is secured, and many males are around to feed her and her offspring. [3]
A cockatoo is any of the 21 species of parrots belonging to the family Cacatuidae, the only family in the superfamily Cacatuoidea. Along with the Psittacoidea and the Strigopoidea, they make up the order Psittaciformes. The family has a mainly Australasian distribution, ranging from the Philippines and the eastern Indonesian islands of Wallacea to New Guinea, the Solomon Islands and Australia.
The palm cockatoo, also known as the goliath cockatoo or great black cockatoo, is a large, smoky-grey/black parrot of the cockatoo family native to New Guinea, the Aru Islands and the Cape York Peninsula in Queensland, Australia. It has a crest of long feathers atop its head, with a very large and strong, sharply-hooked black beak, and prominent bright-red cheek patches.
The white cockatoo, also known as the umbrella cockatoo, is a medium-sized all-white cockatoo endemic to tropical rainforest on islands of Indonesia. When surprised, it extends a large and striking head crest, which has a semicircular shape. The wings and tail have a pale yellow or lemon color which is exposed when they fly. It is similar to other species of white cockatoo such as yellow-crested cockatoo, sulphur-crested cockatoo, and salmon-crested cockatoo, all of which have yellow, orange or pink crest feathers instead of white.
The sulphur-crested cockatoo is a relatively large white cockatoo found in wooded habitats in Australia, New Guinea, and some of the islands of Indonesia. They can be locally very numerous, leading to them sometimes being considered pests. A highly intelligent bird, they are well known in aviculture, although they can be demanding pets.
The Moluccan eclectus is a parrot native to the Maluku Islands (Moluccas). It is unusual in the parrot family for its extreme sexual dimorphism of the colours of the plumage; the male having a mostly bright emerald green plumage and the female a mostly bright red and purple/blue plumage. Joseph Forshaw, in his book Parrots of the World, noted that the first European ornithologists to see eclectus parrots thought they were of two distinct species. Large populations of this parrot remain, and they are sometimes considered pests for eating fruit off trees. Some populations restricted to relatively small islands are comparably rare. Their bright feathers are also used by native tribespeople in New Guinea as decorations.
The radjah shelduck, is a species of shelduck found mostly in New Guinea and Australia, and also on some of the Moluccas. It is known alternatively as the raja shelduck, black-backed shelduck, or in Australia as the Burdekin duck.
The scarlet-chested parrot, known alternately as scarlet-breasted parrot, orange-throated parrot or splendid parrot, is a parrot endemic to central South Australia and inland southern Western Australia. The species is sexually dimorphic; the male has a bright blue face and scarlet chest and yellow underparts, amid overall green plumage, while the female is similar but lacks the red chest. These nomadic parakeets move readily from the Great Victoria Desert region into neighbouring areas. These interruptions are triggered by a search for more favourable conditions. They can survive quite well without access to drinking water, however, as succulent plants help meet much of their fluid requirement. They feed mainly on grass seeds and are most commonly sighted in spinifex.
The Australian masked owl is a barn owl of Southern New Guinea and the non-desert areas of Australia.
The imperial amazon or Dominican amazon, also known as the sisserou or sisserou parrot, is a parrot found only on the Caribbean island of Dominica. It has been designated as the national bird of Dominica, and features on the national flag of Dominica. The species is critically endangered. In 2019, it was estimated there were only about 50 mature individuals left in the wild.
The red-collared lorikeet is a species of parrot found in wooded habitats in northern Australia. It was previously considered a subspecies of the rainbow lorikeet, but today most major authorities consider them as separate species. No other member of the rainbow lorikeet group has an orange-red collar over the nape.
The turquoise parrot is a species of parrot in the genus Neophema native to Eastern Australia, from southeastern Queensland, through New South Wales and into North-Eastern Victoria. It was described by George Shaw in 1792. A small lightly built parrot at around 20 cm (7.9 in) long and 40 g in weight, it exhibits sexual dimorphism. The male is predominantly green with more yellowish underparts and a bright turquoise blue face. Its wings are predominantly blue with red shoulders. The female is generally duller and paler, with a pale green breast and yellow belly, and lacks the red wing patch.
The paradise kingfishers are a group of tree kingfishers endemic to New Guinea — with the exception of two species also present in the Moluccas and Queensland.
The red-cheeked parrot is a species of parrot in the family Psittaculidae found in Indonesia, Papua New Guinea and the tip of northern Queensland, Australia. There are 17 subspecies currently recognized. It is a stocky short-tailed parrot with predominantly green plumage. It exhibits sexual dimorphism; the adult male has red cheeks and a mauve nape and top of head, while the female is duller with a brown head.
Finsch's pygmy parrot, also known as the emerald pygmy parrot and green pygmy parrot, is a member of parrot family Psittacidae inhabiting tropical rainforest regions of islands in Papua New Guinea, the Solomon Islands, and the Bismarck Archipelago.
The rufous owl, also known as the rufous boobook, is a species of owl in the family Strigidae. It was described in 1846 by John Gould, an English ornithologist. Its common name reflects the rufous-coloured feathers that these owls are covered with in adulthood. While it is uncommon, the species has a wide range, including Australia, Indonesia, and Papua New Guinea.
The oceanic eclectus is an extinct parrot species which occurred on Tonga, Vanuatu and possibly on Fiji. Its only living relative is the Moluccan eclectus parrot, which has proportionally larger wings than the oceanic eclectus parrot. The fossil material unearthed in November 1989 in Late Pleistocene and Holocene deposits on 'Eua, Lifuka, 'Uiha and Vanuatu and described in 2006 by David William Steadman include a complete femur, five radii, a quadrate bone, a mandible, a coracoid, two sterna, two humeri, two ulnae, two tibiotarsi, a carpometacarpus, a tarsometatarsus, and three pedal phalanges.
The coconut lorikeet, also known as the green-naped lorikeet, is a parrot in the family Psittaculidae. Seven species of lorikeets now recognised were once lumped together under Trichoglossus haematodus.
The Papuan eclectus, red-sided eclectus, or New Guinea eclectus is a parrot species which is native to New Guinea. Larger than the Moluccan eclectus, the green plumage of the male only has a slight yellow tinge and the tail is tipped with a half-inch yellow band. The central tail feathers are green and lateral ones blue and green. It is widely distributed from Kai Islands and western islands of the West Papua province in the west, across the island of New Guinea to the Trobriands, D'Entrecasteaux Islands, Louisiade Archipelago, Bismarck Archipelago, and Solomon Islands to the east, and south to the northern Cape York Peninsula of Australia. It has also been introduced to the Goram Islands, Indonesia.
The Sumba eclectus, or Cornelia's eclectus is a parrot species which is native to Sumba. Also larger than the Moluccan eclectus, the male is a paler shade of green overall and has a bluer tail. The female has an all red plumage, except for the primaries which are a dark royal blue, and can be differentiated from the Tanimbar eclectus by the lack of yellow to her tail.
The Tanimbar eclectus, or Riedel's eclectus is a parrot species which is native to the Tanimbar Islands. It is smaller than the Moluccan eclectus. The male has a more bluish tinge to its green cheeks and neck, and its tail is edged with a broad band of yellow. The female has an all red plumage, except for royal blue primaries, yellow under-tail coverts and a broad band of yellow to edge the tail.