Шығыс Австралияның қызылбас балқұмыршасы

Bird in the honeyeater family from eastern Australia

The noisy miner (Manorina melanocephala) is a bird in the honeyeater family, Meliphagidae, and is endemic to eastern and southeastern Australia. This miner is a grey bird, with a black head, orange yellow beak and feet, a distinctive yellow patch behind the eye, and white tips on the tail feathers. The Tasmanian subspecies has a more intense yellow panel in the wing, and a broader white tip to the tail. Males, females and juveniles are similar in appearance, though young birds are a brownish grey. As the common name suggests, the noisy miner is a vocal species with a large range of songs, calls, scoldings and alarms, and almost constant vocalisations, particularly from young birds. One of four species in the genus Manorina, the noisy miner itself is divided into four subspecies. The separation of the Tasmanian M. m. leachi is of long standing, and the mainland birds were further split in 1999. Found in a broad arc from Far North Queensland through New South Wales and Victoria to Tasmania and southeastern South Australia, the noisy miner primarily inhabits dry, open eucalypt forests that lack understory shrubs. These include forests dominated by spotted gum, box and ironbark, as well as in degraded woodland where the understory has been cleared, such as recently burned areas, farming and grazing areas, roadside reserves, and suburban parks and gardens with trees and grass, but without dense shrubbery. The density of noisy miner populations has significantly increased in many locations across its range, particularly in human dominated habitats. The popularity of nectar producing garden plants, such as the large flowered grevilleas, was thought to play a role in its proliferation, but studies now show that the noisy miner has benefited primarily from landscaping practices that create open areas dominated by eucalypts. Noisy miners are gregarious and territorial; they forage, bathe, roost, breed and defend territory communally, forming colonies that can contain several hundred birds. Each bird has an 'activity space', and birds with overlapping activity spaces form associations called 'coteries', which are the most stable units within the colony. The birds also form temporary flocks called 'coalitions' for specific activities, such as mobbing a predator. Group cohesion is facilitated not only by vocalisations, but also through ritualised displays, which have been categorised as flight displays, postural displays, and facial displays. The noisy miner is a notably aggressive bird, so that chasing, pecking, fighting, scolding, and mobbing occur throughout the day, targeted at both intruders and colony members. Foraging in the canopy of trees, on trunks and branches, and on the ground, the noisy miner mainly eats nectar, fruit, and insects. Most time is spent gleaning the foliage of eucalypts, and it can meet most of its nutritional needs from manna, honeydew, and lerp gathered from the foliage. The noisy miner does not use a stereotyped courtship display, but copulation is a frenzied communal event. It breeds all year long, building a deep cup shaped nest and laying two to four eggs. Incubation is by the female only, although up to twenty male helpers take care of the nestlings and fledglings. Noisy miners have a range of strategies to increase their breeding success, including multiple broods and group mobbing of predators. The noisy miner's population increase has been correlated with the reduction of avian diversity in human affected landscapes. Its territoriality means that translocation is unlikely to be a solution to its overabundance, and culling has been proposed, although the noisy miner is currently a protected species across Australia.

English ornithologist John Latham described the noisy miner four times in his 1801 work Supplementum Indicis Ornithologici, sive Systematis Ornithologiae, seemingly not knowing it was the same bird in each case: the chattering bee eater (Merops garrulus), black headed grackle (Gracula melanocephala), hooded bee eater (Merops cucullatus), and white fronted bee eater (Merops albifrons). Early notes recorded its tendency to scare off prey as hunters were about to shoot. It was as the chattering bee eater that it was painted between 1792 and 1797 by Thomas Watling, one of a group known collectively as the Port Jackson Painter. John Gould treated the name Merops garrulus as the original description, and renamed it Myzantha garrula in his 1865 work Handbook to the Birds of Australia, giving it the common name of garrulous honeyeater, and noting the alternate name of chattering honeyeater. He noted the colonists of Tasmania called it a miner, and aboriginal people of New South Wales called it cobaygin. Que que gang was a local aboriginal name from the Blue Mountains. In the early 19th century, Australian ornithologists started using the name Manorina melanocephala instead, because it was listed first by Latham in 1801. This usage did not follow the letter of the International Code of Zoological Nomenclature, and in 2009 the International Commission on Zoological Nomenclature conserved the current name by formally suppressing the name M. garrula. The species name melanocephala is derived from the Ancient Greek words melas 'black', and kephale 'head', referring to its black crown. Other common names include Mickey miner and soldierbird. Four subspecies are recognised, including subspecies leachi found in eastern Tasmania. The mainland population was split into three subspecies in 1999 by Richard Schodde—titaniota from Cape York Peninsula in Queensland as far south as Mareeba, lepidota from central Queensland and inland New South Wales west of Nyngan, and the nominate subspecies melanocephala from southeastern New South Wales, Victoria, and southern South Australia. There are broad zones where birds are intermediate between subspecies. Further study is required to settle the taxonomic status of these populations. The noisy miner is one of four species in the genus Manorina in the large family of honeyeaters known as Meliphagidae. The other three species of the genus Manorina are the black eared miner (M. melanotis), the yellow throated miner (M. flavigula), and the bell miner (M. melanophrys). One of the most obvious characteristics of the genus is a patch of bare yellow skin behind the eyes, which gives them an odd 'cross eyed' look. Within the genus, the noisy, black eared and yellow throated miners form the subgenus Myzantha.

The noisy miner is a large honeyeater, in length, with a wingspan of , and weighing Male, female and juvenile birds all have similar plumage: grey on the back, tail and breast, and otherwise white underneath, with white scalloping on the nape and hind neck, and on the breast; off white forehead and lores; a black band over the crown, bright orange yellow bill, and a distinctive patch of yellow skin behind the eye; a prominent white tip to the tail; a narrow olive yellow panel in the folded wing; and orange yellow legs and feet. A juvenile can be distinguished by softer plumage, a brownish tinge to the black on its head and the grey on its back, and a duller, greyish yellow skin patch behind the eye. The noisy miner is similar in appearance to the yellow throated miner and the black eared miner; it has a dull white forehead and a black crown, while the others have grey heads.

Size variation in the noisy miner over its range follows Bergmann's rule; namely, birds tend to be larger where the climate is colder. The aerial predator alarm call is a series of high pitched, slurred whistling notes. The broad frequency alarm calls are a series of 'churr' notes, low pitched and harsh, occurring at low and high levels of intensity. The narrow band call is used in situations where the bird signals the presence of a predator and restricts information about its own location, while the broad band alarm is used to attract attention, and can initiate mobbing behaviour. These churring calls vary between individuals, and laboratory tests show that noisy miners can distinguish calls by different birds. Hence, this may be integral to the complex social structure of the species. Contact or social facilitation calls are low pitched sounds that carry long distances. 'Chip' calls are given by individual birds when foraging, and a similar call is given by nestlings that call at an increased rate as the mother approaches the nest. Another display call, described as 'yammer', is a rapid rhythmical series of notes that is uttered during open bill, wing waving displays. The noisy miner has a song described as the 'dawn song'—a communal song of clear, whistled notes emitted in chorus in the early hours of the morning from May through January. This phenomenon has been also observed in rural areas. A field study across the South West Slopes of New South Wales showed that the noisy miner's presence corresponded with reduced numbers of insectivorous birds, such as fantails, whistlers, the restless flycatcher (Myiagra inquieta), and other honeyeater species, and that this decrease was most marked in sites with better access to water and nutrients. While it has been hypothesised that the proliferation of large flowering grevillea cultivars has contributed to the abundance of noisy miners, recent research has identified the proliferation of lightly treed, open areas, and the presence of eucalypt species as the most significant factors in the population increase. and a continuous nectar source could provide an advantage for the non migratory species. A field study in box ironbark country in central Victoria found that noisy miner numbers were correlated with the occurrence of yellow gum (Eucalyptus leucoxylon), which reliably produces flowers (and nectar) each year. The abundance of the noisy miner is primarily determined by habitat structure. While the range of the noisy miner has not significantly expanded, the density of the population within that range has substantially increased. High densities of noisy miners are regularly recorded in forests with thick understory in southern Queensland, or more from the forest/agricultural land edge. Many of these sites have extensive road networks used for forest management, and picnic areas and walking tracks for recreational use, and it has been found that these cleared spaces play a role in the abundance of noisy miners in the forest. There is evidence to suggest that higher road densities correspond with higher noisy miner population levels. Field work in Victoria showed that noisy miners infiltrated anywhere from into remnant woodland from the edges, with greater penetration occurring in less densely forested areas. This has implications for the size of woodland habitat needed to contain miner free areas—around Revegetation projects restoring buloke woodland, a species of she oak integral to the survival of the red tailed black cockatoo (Calyptorynchus banksii), have been interplanted with a nurse species, usually fast growing eucalypts. Noisy miner populations were more likely in those buloke woodlands where eucalypts had been planted at densities of up to 16 per hectare (6.4 per acre). The presence of noisy miners was accompanied by a substantial difference in number and types of other birds found in the woodland.

The noisy miner does not use a stereotyped courtship display; displays can involve 'driving', where the male jumps or flies at the female from away, and if she moves away he pursues her aggressively. The female may perform a 'bowed wing display', where the wings and tail are spread and quivered, with the wings arched and the head pointing down. The male may adopt a vertical or horizontal 'eagle display', with wings and tail spread wide and held still for several seconds. Copulation is frequent and conspicuous, with both males and females copulating with several birds, while other members of the colony display or otherwise interfere with the mating pair. The noisy miner breeds all year long, with most activity from July through November, though the peak period is subject to seasonal variations, with sharp peaks in laying activity when conditions are particularly favourable for raising young. The nest is built in prickly or leafy trees, and the noisy miner is often recorded nesting in eucalypts, and also in wattles, Araucaria, Banksia, Bursaria, Hibiscus, mistletoe, Melaleuca, Pittosporum, Schinus, and jacaranda. It seems to prefer moderately dense foliage for nesting, often near the end of drooping horizontal branches. Support for the nest may be the primary criterion of a suitable nest site, rather than characteristics of the vegetation or location. The female alone builds the nest, which is deep and cup shaped, woven of twigs and grasses with other plant material, animal hair and spider webs. Occasionally, the nest will include man made materials such as twine, scraps of material, and tissue paper. It is lined with wool, hair, feathers, flowers or plant down, and padded with a circular mat woven from fibres pulled from the cocoons of the processional caterpillar. The female noisy miner walks around on the ground close to the nest site, picking up material. Only males help with a nest, and while many birds may be associated with a particular brood, some males devote all their time to a single nest, while others spread their helping efforts across five or six nests. although one study found no relationship between the number of helpers visiting a nest site and its success or failure. Noisy miners were seen to have a range of strategies to increase their breeding success, including multiple broods, laying eggs early in the season, nesting low in the canopy and group mobbing of predators; these measures did not guarantee against nest failure, due to the diversity of potential predators in the noisy miner's open woodland habitat.

The noisy miner primarily eats nectar, fruit, and insects, and occasionally it feeds on small reptiles or amphibians. It is both arboreal and terrestrial, feeding in the canopy of trees, on trunks and branches, and on the ground. It forages within the colony's territory throughout the year, usually in groups of five to eight birds, although hundreds may gather at a stand of flowering trees, such as banksia. The noisy miner collects nectar directly from flowers, hanging upside down or straddling thin branches acrobatically to access the nectar; it takes fruit from trees or fallen on the ground; gleans or hawks for invertebrates; and picks through leaf litter for insects. It has been recorded turning over the dried droppings of emu (Dromaius novaehollandiae) and eastern grey kangaroo (Macropus giganteus), searching for insects. In a study of birds foraging in suburban gardens, the noisy miner was seen to spend more time in banksia, grevillea and eucalypt species, and when in flower, callistemon, than in other plants including exotics. Most time was spent gleaning the foliage of eucalypts, and noisy miners were significantly more abundant in sites where eucalypts were present. The noisy miner can meet most of its nutritional needs from manna, honeydew, and lerp gathered from the foliage of eucalypts. Detailed studies of the diet of the noisy miner record it eating a range of foods including: spiders; insects (leaf beetles, ladybirds, stink bugs, ants, moth and butterfly larvae); nectar (from Jacaranda mimosifolia, Erythrina variegata, Lagunaria patersonia, Callistemon salignus, Callistemon viminalis, eucalypts Argyle apple, sugar gum, yellow gum, grey ironbark, and grey gum, Banksia ericifolia, B. integrifolia, B. serrata, Grevillea aspleniifolia, G. banksii, G. hookeriana, G. juniperina, G. rosmarinifolia, and flowering quince); seeds from oats, wheat and pepper tree; fruit from saltbush, mistletoe and crabapple; frogs and skinks; and other matter, such as bread, pieces of meat and cheese, and food scraps. In the first study to demonstrate different learning techniques in a single species, the noisy miner was found to employ different cognitive strategies, depending upon the resource it was foraging. When searching for nectar, which does not move but is readily depleted, the noisy miner uses a spatial memory based strategy, identifying characteristics of the environment—a strategy that is efficient in new environments and is not affected by changes in the bird's activities. When searching for invertebrates, it appears to employ a different strategy based on learned rules of insect movement (they improve at finding invertebrates with practice). The two different strategies imply the existence of adapted cognitive mechanisms, capable of responding appropriately to different foraging contexts.

Abundant throughout its significant range, the noisy miner is considered of least concern for conservation, The role played by the noisy miner in the steep decline of many woodland birds, its impact on endangered species with similar foraging requirements, and the level of leaf damage leading to die back that accompanies the exclusion of insectivorous birds from remnant woodlands, means that any strategy to restore avian diversity will need to take account of the management of noisy miner populations. Some habitat restoration and revegetation projects have inadvertently increased the problem of the noisy miner by establishing the open eucalypt habitat that they prefer. A focus of many regeneration projects has been the establishing of habitat corridors that connect patches of remnant forest, and the use of eucalypts as fast growing nurse species. Both practices have sound ecological value, but allow the noisy miner to proliferate, so conservation efforts are being modified by planting a shrubby understory with the eucalypts, and avoiding the creation of narrow protrusions, corners or clumps of trees in vegetation corridors. A field study conducted in the Southern Highlands found that noisy miners tended to avoid areas dominated by wattles, species of which in the study area had bipinnate leaves. Hence the authors proposed that revegetation projects include at least 15% Acacia species with bipinnate leaves if possible, as well as shrubby understory plants. Translocation of noisy miners is unlikely to be a solution to their overabundance in remnant habitats. In a Victorian study where birds were banded and relocated, colonies moved into the now unpopulated area, but soon returned to their original territories. The translocated birds did not settle in a new territory. They were not assimilated into resident populations of miners, but instead wandered up to from the release point, moving through apparently suitable habitat occupied by other miners—at least for the first 50 days following translocation. Two birds with radio tracking devices travelled back to their site of capture. Although noisy miners are protected across Australia, and a permit is required to cull them, culling has been proposed as the most humane and practical method of reducing their impact, particularly where combined with rehabilitation of the habitat to suit a wider variety of bird life.