Splendid Fairywren

Splendid Fairywren
Splendid Fairywren
A male Splendid Fairywren (subsp. splendens)
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Maluridae
Genus: Malurus
Species: M. splendens
Binomial name
Malurus splendens
(Quoy & Gaimard, 1830)
Splendid Fairywren range

The Splendid Fairywren (Malurus splendens), also known simply as the Splendid Wren or more colloquially in Western Australia as the Blue Wren, is a passerine bird of the Maluridae family. It is found across much of the Australian continent from central-western New South Wales and southwestern Queensland over to coastal Western Australia. It inhabits predominantly arid and semi-arid regions. Exhibiting a high degree of sexual dimorphism, the male in breeding plumage is a small, long-tailed bird of predominantly bright blue and black colouration. Non-breeding males, females and juveniles are predominantly grey-brown in colour; this gave the early impression that males were polygamous as all dull-coloured birds were taken for females. It comprises several similar all-blue and black subspecies that were originally considered separate species.

Like other fairywrens, the Splendid Fairywren is notable for several peculiar behavioural characteristics; birds are socially monogamous and sexually promiscuous, meaning that although they form pairs between one male and one female, each partner will mate with other individuals and even assist in raising the young from such trysts.[2] Male wrens pluck pink or purple petals and display them to females as part of a courtship display.[3]

The habitat of the Splendid Fairywren ranges from forest to dry scrub, generally with ample vegetation for shelter. Unlike the eastern Superb Fairywren, it has not adapted well to human occupation of the landscape and has disappeared from some urbanised areas. The Splendid Fairywren mainly eats insects and supplements its diet with seeds.



The Splendid Fairywren is one of 12 species of the genus Malurus, commonly known as fairywrens, found in Australia and lowland New Guinea.[4] Within the genus it is most closely related to the Superb Fairywren. These two "Blue wrens" are closely related to the Purple-crowned Fairywren of north-western Australia.[5]

Specimens were initially collected at King George Sound, and the Splendid Fairywren then described as Saxicola splendens by the French naturalists Jean René Constant Quoy and Joseph Paul Gaimard in 1830,[6] three years before John Gould gave it the scientific name of Malurus pectoralis and vernacular name of Banded Superb-warbler.[7] Though he correctly placed it in the genus Malurus, the specific name of the former authors took priority. The specific epithet is derived from the Latin splendens, which means "shining".[8] Like other fairywrens, the Splendid Fairywren is unrelated to the true wren. It was first classified as a member of the old world flycatcher family Muscicapidae by Richard Bowdler Sharpe,[9][10] though it was later placed in the warbler family Sylviidae by the same author,[11] before being placed in the newly recognised Maluridae in 1975.[12] More recently, DNA analysis has shown the family to be related to Meliphagidae (honeyeaters), and the Pardalotidae in a large superfamily Meliphagoidea.[13][14]


Male, ssp. emmettorum
Cunnamulla, SW Queensland
Female, ssp. emmettorum
Cunnamulla, SW Queensland

Current taxonomy recognises four subspecies: M. s. splendens in Western Australia, M. s. musgravei in central Australia (subspecies previously recognised as M. s. callainus), M. s. melanotus in inland eastern Australia and M. s. emmottorum in southwestern Queensland.[15] Initially, the three were considered separate species as they were described far from their borders with other subspecies. However, as the interior of Australia was explored, it became apparent there were areas of hybridisation where subspecies overlapped. Thus in 1975, the first three forms below were reclassified as subspecies of Malurus splendens.

  • M. s. splendens, known as the Splendid- or Banded Fairywren, is found in much of central and southern Western Australia. This was the original form named by Quoy and Gaimard in 1830.
  • M. s. melanotus, known as the Black-backed Fairywren, was described by John Gould in 1841 as a separate species.[16] It is found in the mallee country of South Australia (Sedan area north-east of Adelaide) through western Victoria, western New South Wales and into south western Queensland. It differs from the nominate subspecies in having a black back and whitish lower belly.
  • M. s. musgravei was described in 1922 by amateur ornithologist Gregory Mathews as a separate species from the Lake Eyre Basin in central Australia.[17] It is found in mulga and mallee country across much of South Australia and the southern Northern Territory. It has lighter blue or turquoise upperparts than the Splendid Fairywren, as well as a black rump. This is largely synonymous with what was known as M. callainus or the Turquoise Fairywren which had been collected by ornithologist Samuel White and named by John Gould in 1867. The original collection bearing the name callainus was deemed a hybrid between what is now called musgravei and melanotus, and hence musgravei was resurrected as the name for the Turquoise Fairywren.[15]
  • M. s. emmottorum was described from southwestern Queensland and given subspecific status in the 1999 review by Schodde and Mason.[15] It was named after Angus Emmott, a farmer and amateur biologist in western Queensland.[18]

Evolutionary history

In his 1982 monograph, ornithologist Richard Schodde proposed a southern origin for the common ancestor of the Superb and Splendid Fairywrens. At some time in the past it was split into southwestern (Splendid) and southeastern (Superb) enclaves. As the southwest was dryer than the southeast, once conditions were more favourable, the Splendid forms were more able to spread into inland areas. These split into at least three enclaves which subsequently evolved in isolation in the following drier glacial periods until the current more favourable climate saw them expand once again and interbreed where they overlap. This suggests the original split was only very recent as the forms had insufficient time to speciate. Further molecular studies may result in this hypothesis being modified.[19]


Subspecies splendens female,
showing chestnut bill and bluish tail

The Splendid Fairywren is a small, long-tailed bird 14 centimetres (5.5 in) long. Exhibiting a high degree of sexual dimorphism, the breeding male is distinctive with a bright blue forehead and ear coverts, a violet throat and deeper rich blue back wings, chest and tail with a black bill, eye band and chest band. The blue breeding plumage of the male is often referred to as nuptial plumage. The non-breeding male is brown with blue in the wings and a bluish tail. The female resembles the non-breeding male but has a chestnut bill and eye-patch.[20] Immature males will moult into breeding plumage the first breeding season after hatching, though this may be incomplete with residual brownish plumage and may take another year or two to perfect.[21] Both sexes moult in autumn after breeding, with males assuming an eclipse non-breeding plumage. They will moult again into nuptial plumage in winter or spring.[22] Some older males have remained blue all year, moulting directly from one year's nuptial plumage to the next.[23] Breeding males' blue plumage, particularly the ear-coverts, is highly iridescent due to the flattened and twisted surface of the barbules.[24] The blue plumage also reflects ultraviolet light strongly, and so may be even more prominent to other fairywrens, whose colour vision extends into this part of the spectrum.[25] The call is described as a gushing reel;[20] this is harsher and louder than other fairywrens and varies from individual to individual.[26] A soft single trrt serves as a contact call within a foraging group, while the alarm call is a tsit. Cuckoos and other intruders may be greeted with a threat posture and churring threat.[27] Females emit a purr while brooding.[28]

Distribution and habitat

The Splendid Fairywren is widely distributed in the arid and semi-arid zones of Australia. Habitat is typically dry and shrubby; mulga and mallee in drier parts of the country and forested areas in the southwest.[19] The western subspecies splendens and eastern Black-backed Fairywren (subspecies melanotus) are largely sedentary, although the Turquoise Fairywren (subspecies musgravei) is thought to be partially nomadic.[19] Unlike the eastern Superb Fairywren, the Splendid Fairywren has not adapted well to human occupation of the landscape and has disappeared from some urbanised areas.[29] Forestry plantations of pine (Pinus spp.) and eucalypts are also unsuitable as they lack undergrowth.[30]


Subspecies melanotus with face fan display, Lake Cargelligo

Like all fairywrens, the Splendid Fairywren is an active and restless feeder, particularly on open ground near shelter, but also through the lower foliage. Movement is a series of jaunty hops and bounces,[31] with its balance assisted by a proportionally large tail, which is usually held upright and rarely still. The short, rounded wings provide good initial lift and are useful for short flights, though not for extended jaunts.[32] However, Splendid Fairywrens are stronger fliers than most other fairywrens.[33] During spring and summer, birds are active in bursts through the day and accompany their foraging with song. Insects are numerous and easy to catch, which allows the birds to rest between forays. The group often shelters and rests together during the heat of the day. Food is harder to find during winter and they are required to spend the day foraging continuously.[34]

Groups of two to eight Splendid Fairywrens remain in their territory and defend it year-round.[23] Territories average 4.4 ha (11 acres) in woodland-heath areas;[35] size decreases with increasing density of vegetation and increases with the number of males in the group.[33] The group consists of a socially monogamous pair with one or more male or female helper birds that were hatched in the territory, though they may not necessarily be the offspring of the main pair. Splendid Fairywrens are sexually promiscuous, each partner mating with other individuals and even assisting in raising the young from such trysts. Over a third of offspring are the result of an 'extramarital' mating.[2] Helper birds assist in defending the territory and feeding and rearing the young.[36] Birds in a group roost side-by-side in dense cover as well as engage in mutual preening.[33]

Major nest predators include Australian Magpies (Gymnorhina tibicen), butcherbirds (Cracticus spp.), Laughing Kookaburra (Dacelo novaeguineae), currawongs (Strepera spp.), crows and ravens (Corvus spp.), shrike-thrushes (Colluricincla spp.) as well as introduced mammals such as the Red Fox (Vulpes vulpes), cat (Felis catus) and Black Rat (Rattus rattus).[37] Like other species of fairy wrens, Splendid Fairywrens may use a 'Rodent-run' display to distract predators from nests with young birds. While doing this, the head, neck and tail of the bird are lowered, the wings are held out and the feathers are fluffed as the bird runs rapidly and voices a continuous alarm call.[38]


The Splendid Fairywren is predominantly insectivorous; its diet includes a wide range of small creatures, mostly arthropods such as ants, grasshoppers, crickets, spiders and bugs. This is supplemented by small quantities of seeds, flowers, and fruit.[39] They mostly forage on the ground or in shrubs that are less than two metres above the ground; this has been termed 'hop-searching'. Unusually for fairywrens, they may also occasionally forage in the canopy of flowering gums.[33] Birds tend to stick fairly close to cover and forage in groups as this foraging practice does render them vulnerable to a range of predators. Food can be scarce in winter and ants are an important 'last resort' option, constituting a much higher proportion of the diet.[40] Adult fairywrens feed their young a different diet, conveying larger items such as caterpillars and grasshoppers to nestlings.[41]


Several courtship displays by Splendid Fairywren males have been recorded; the 'Sea Horse Flight,' so named for the similarity of movements to those by a seahorse, is an exaggerated undulating flight where the male, with his neck extended and his head feathers erect, flies and tilts his body from horizontal to vertical and by rapidly beating wings is able to descend slowly and spring upwards after alighting on the ground.[42] The 'Face fan' display may be seen as a part of aggressive or sexual display behaviours; it involves the flaring of the blue ear tufts by erecting the feathers.[43]

Turquoise Fairywren (subsp. musgravei) with purplish petal – Gawler Ranges, South Australia

Another interesting habit of males of this and other fairywren species during the reproductive season is to pluck petals (in this species, predominantly pink and purple ones which contrast with their plumage) and show them to female fairywrens.[3] Petals often form part of a courtship display and are presented to a female in the male fairywren's own or another territory. Outside the breeding season males may sometimes still show petals to females in other territories, presumably to promote themselves.[44] It is notable that fairywrens are socially monogamous and sexually promiscuous: pairs will bond for life,[45] but regularly mate with other individuals; a proportion of young will have been fathered by males from outside the group. Young are often raised not by the pair alone, but with other males who also mated with the pair's female assisting. Thus, petal-carrying might be a behaviour that strengthens the pair-bond. Petal carrying might also be a way for extra males to gain matings with the female. In either case, the data does not strongly link petal-carrying and presenting to a copulation soon thereafter.

Researchers at Department of Ecology and Evolution, University of Chicago published an paper in Behavioral Ecology in 2010 showing that male Splendid Fairywrens sing display-like vocalizations (Type II song) in response to predator calls. The trills "hitchhike" on the predator's vocalization and the female Splendid Fairywrens, which have become more alert due to the predator calls, also respond more strongly to this type II song than when it's given without a predator call preceding it.[46]


Breeding occurs from late August through to January, though heavy rain in August may delay this. The nest is built by the female; it is a round or domed structure made of loosely woven grasses and spider webs, with an entrance in one side close to the ground and well-concealed in thick and often thorny vegetation, such as Acacia pulchella or a species of Hakea.[47] One or two broods may be laid during the breeding season. A clutch of two to four dull white eggs with reddish-brown splotches and spots, measuring 12 × 16 mm (½ × ⅝ in), are laid.[48] Incubation takes about two weeks.[49] The female incubates the eggs for 14 or 15 days; after hatching, nestlings are fed and their fecal sacs removed by all group members for 10–13 days, by which time they are fledged.[50] Young birds remain in the family group as helpers for a year or more before moving to another group, usually an adjacent one, or assuming a dominant position in the original group.[51] In this role they feed and care for subsequent broods.[47]

Splendid Fairywrens also commonly play host to the brood parasite Horsfield's Bronze Cuckoo (Chalcites basalis),[52] with the Shining Bronze Cuckoo (Chalcites lucidus) also recorded.[53]

Cultural depictions

The bird was intended to be illustrated on an Australia Post 45c pre-stamped envelope released on 12 August 1999;[54] however, a Superb Fairywren was mistakenly illustrated instead.[55]


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Cited text

  • Rowley, Ian & Russell, Eleanor (1997). Bird Families of the World: Fairy-wrens and Grasswrens. Oxford: Oxford University Press. ISBN 0-19-854690-4. 

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