The Australasian wrens are a family, Maluridae, of small, insectivorous passerine birds endemic to Australia and New Guinea. While commonly known as wrens, they are unrelated to the true wrens. The family comprises 29 species (including fifteen fairywrens, three emu-wrens, and eleven grasswrens) in six genera.
|Male superb fairywren|
(Malurus cyaneus, Maluridae)
|Malurus coronatus song|
Taxonomy and systematicsEdit
As with many other Australian creatures, and perhaps more than most, the species making up this family were comprehensively misunderstood by early researchers. They were variously classified as Old World flycatchers, Old World warblers, and Old World babblers. In the late 1960s morphological studies began to suggest that the Australo-Papuan fairywrens, the grasswrens, emu-wrens and two monotypic wren-like genera from New Guinea were related and, following Charles Sibley's pioneering work on egg-white proteins in the mid-1970s, Australian researchers adopted the family name Maluridae in 1975.
With further morphological work and the great strides made in DNA analysis towards the end of the 20th century, their position became clear: the Maluridae are one of the many families to have emerged from the great corvid radiation in Australasia. Their closest relatives are the honeyeaters (Meliphagidae), and the pardalotes (Pardalotidae). Their obvious similarity to the wrens of Europe and America is not genetic, but simply the consequence of convergent evolution between more-or-less unrelated species that share the same ecological niche.
A 2011 analysis of mitochondrial and nuclear DNA found the broad-billed fairywren and Campbell's fairywren, both formerly lumped together in the genus Malurus, to lie in a clade with the two other monospecific New Guinea genera and as such, they were later re-classified as separate species within the genus Chenorhamphus.
Currently, there are 6 genera recognized:
- Subfamily: Malurinae
- Subfamily Amytornithinae
- Genus Amytornis – grasswrens (11 species)
Malurids are small to medium birds, inhabiting a wide range of environments from rainforest to desert, although most species inhabit grassland or scrub. The grasswrens are well camouflaged with black and brown patterns, but other species often have brilliantly coloured plumage, especially in the males.
They are insectivorous, typically foraging in underbrush. They build domed nests in areas of dense vegetation, and it is not unusual for the young to remain in the nest and assist in raising chicks from later clutches.
Fairywrens are notable for several peculiar behavioral characteristics. They 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 pairings. Males of several species pluck petals of conspicuous colours and display them to females for reasons unknown.
The song of fairywrens is pleasant and complex, and at least two species (superb and splendid) possess, in addition to the alarm calls common to – and universally understood by – most small birds, another vocalization used when confronted by predators. This, termed "Type II Vocalization," is song-like and used when confronted by calling butcherbirds, and sometimes other predatory birds. Its purpose is, however, unknown; it does not seem to be a warning call.
- Schodde R (1975). "Interim List of Australian Songbirds". Melbourne: RAOU. Cite journal requires
- Jønsson, K. A.; Fabre, P. H.; Ricklefs, R. E.; Fjeldså, J (2011). "Major global radiation of corvoid birds originated in the proto-Papuan archipelago". Proceedings of the National Academy of Sciences. 108 (6): 2328–2333. Bibcode:2011PNAS..108.2328J. doi:10.1073/pnas.1018956108. PMC 3038755. PMID 21262814.
- Barker, FK; Barrowclough GF; Groth JG (2002). "A phylogenetic hypothesis for passerine birds: taxonomic and biogeographic implications of an analysis of nuclear DNA sequence data". Proc. R. Soc. Lond. B. 269 (1488): 295–308. doi:10.1098/rspb.2001.1883. PMC 1690884. PMID 11839199.
- Barker, FK; Cibois A; Schikler P; Feinstein J; Cracraft J (2004). "Phylogeny and diversification of the largest avian radiation" (PDF). Proc. Natl. Acad. Sci. USA. 101 (30): 11040–11045. Bibcode:2004PNAS..10111040B. doi:10.1073/pnas.0401892101. PMC 503738. PMID 15263073. Archived from the original (PDF) on 2007-10-25. Retrieved 2007-10-12.
- Driskell, Amy C.; Norman, Janette A.; Pruett-Jones, Stephen; Mangall, Elizabeth; Sonsthagen, Sarah; Christidis, Les (2011). "A multigene phylogeny examining evolutionary and ecological relationships in the Australo-papuan wrens of the subfamily Malurinae (Aves)". Molecular Phylogenetics and Evolution. 60 (3): 480–85. doi:10.1016/j.ympev.2011.03.030. PMID 21466855.
- Gill, Frank; Donsker, David, eds. (2017). "Lyrebirds, scrubbirds, bowerbirds & Australasian wrens". World Bird List Version 7.3. International Ornithologists' Union. Retrieved 8 November 2017.
- Garnett, Stephen (1991). Forshaw, Joseph (ed.). Encyclopaedia of Animals: Birds. London: Merehurst Press. p. 196. ISBN 1-85391-186-0.
- Greig, Emma I.; Pruett-Jones, Stephen (2009). "A predator-elicited song in the splendid fairy-wren: warning signal or intraspecific display?". Anim. Behav. 78: 45–52. doi:10.1016/j.anbehav.2009.02.030.