The northern house wren (Troglodytes aedon) is a very small passerine in the wren family Troglodytidae. It found in southern Canada, the USA and Mexico. It occurs in most suburban areas in its range. It formerly included many subspecies resident in South America and in the Caribbean that are now considered as separate species. The name troglodytes means "hole dweller", and is a reference to the bird's tendency to disappear into crevices when hunting insects or to seek shelter.

Northern house wren
Northern house wren
Bandelier National Monument (New Mexico, US)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Troglodytidae
Genus: Troglodytes
Species:
T. aedon
Binomial name
Troglodytes aedon
Vieillot, 1809

Taxonomy

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The northern house wren was formally described in 1809 by the French ornithologist Louis Pierre Vieillot under the current binomial name Troglodytes aedon.[2] The specific epithet is from the Ancient Greek aēdōn meaning "nightingale".[3] The type locality was designated as New York City by Harry Oberholser in 1934.[4][5] An earlier specific name, domestica in the combination Sylvia domestica, was introduced in 1808 by the American ornithologist Alexander Wilson.[6] This was rarely used and in 1998 to conserve the widely used name aedon, the International Commission on Zoological Nomenclature suppressed the specific name domestica for the purposes of the principle of priority.[7][8]

Four subspecies are recognised:[9]

The following species were formerly considered as subspecies in the house wren complex. The species were split based on the deep genomic divergence and differences in vocalizations and morphology.[9][10][11]

Description

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Adult northern house wrens are about 11 to 13 cm (4.3 to 5.1 in) long, with a 15 cm (5.9 in) wingspan and weigh about 10 to 12 g (0.35 to 0.42 oz).[12] Among standard measurements, the wing chord is 4.7 to 5.3 cm (1.9 to 2.1 in), the tail is 3.9 to 4.4 cm (1.5 to 1.7 in), the culmen is 1.1 to 1.3 cm (0.43 to 0.51 in) and the tarsus is 1.6 to 1.8 cm (0.63 to 0.71 in).[13] The subspecies vary greatly, with upper parts ranging from dull greyish-brown to rich rufescent-brown, and the underparts ranging from brown, over buff and pale grey, to pure white. All subspecies have blackish barring to the wings and tail, and some also to the flanks. All subspecies show a faint eye-ring and eyebrow and have a long, thin bill with a blackish upper mandible, and a black-tipped yellowish or pale grey lower mandible. The legs are pinkish or grey. The short tail is typically held cocked.[14]

This bird's rich bubbly song is commonly heard during the nesting season but rarely afterwards. There is marked geographical variation in the song, though somewhat more gradual than in the bird's outward appearance that can strikingly differ, e.g., on neighboring islands in the Caribbean.[15] Birds from the far north and south of the species' range nonetheless have songs that differ markedly.[16]

Behavior and ecology

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The northern house wren is thought to achieve the highest density in floodplain forests in the western great plains where it uses woodpecker holes as nesting sites. The birds migrate to the southern United States and Mexico for winter. Most return to the breeding grounds in late April to May, and leave for winter quarters again around September to early October.[17] These birds forage actively in vegetation. They mainly eat insects such as butterfly larvae, beetles and bugs,[18] also spiders and snails.[19] Southern house wrens rarely attend mixed-species feeding flocks.[20]

Breeding

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Audubon's illustration of nesting house wrens

The nesting habits do not seem to differ significantly between the northern and southern house wrens. They usually construct a large cup nest in various sorts of cavities, taking about a week to build. The nest is made from small dry sticks and is usually lined with a variety of different materials. These include: feather, hair, wool, spider cocoons, strips of bark, rootlets, moss, and trash. The male wren finds dry sticks, which he adds to the nest. Once he is done, the female inspects the nest; but if she does not approve of the construction, she will throw any unwanted sticks to the ground. After this process, the female lines the nest. Nest cavities are usually a few meters above ground at most,[21][22] but occasionally on cliffs as high up as 15 m (49 ft) and more at least in southern populations[verification needed]; they may be natural or man-made, often using bird houses.

Northern house wrens are feisty and pugnacious animals considering their tiny size. They are known to occasionally destroy the eggs of other birds nesting in their territory by puncturing the eggshell. Females that sang more songs to conspecifics that were simulated by playback lost fewer eggs to ovicide by other wrens. Female bird song in this species is, therefore, thought to have a function in competition and is not only displayed by males.[23] They are also known to fill up other birds' nests within its territory with sticks to make them unusable.[24]

House wren removing the contents of a tree swallow nest from a nest box (Tree swallow not shown).
Adult bringing food for young (note begging calls)
 
House Wren peering out from a nesting box

Depending on the exact population, the northern house wrens' clutch is usually between two and eight red-blotched cream-white eggs,[25] weighing about 1.4 g (0.05 oz) each and measuring c.17 and 13.4 mm (0.67 and 0.53 in) at the widest points. Only the female incubates these, for around 12–19 days,[25] and she will every now and then leave the nest for various reasons. While she is on the nest, the male provisions her with food. The young, which like all passerines hatch almost naked and helpless, take another 15–19 days or so to fledge[26]. They are being fed by both parents, and need plenty of food given their tiny size (see also Bergmann's Rule). As the young near fledging, the parents spend much of their time procuring food for them. Brood loss due to predation was found to be light in the Southern Andean Yungas, with predation of nestling young being almost insignificant.[27] Known predators of house wrens at the nest include cats, rats, opossums, woodpeckers, foxes, raccoons, squirrels, snakes and owls. Adults away from the nests can usually avoid these predators although both small hawks and owls occasionally take free-flying adult wrens.[28]

Migrant populations are nesting within 6 weeks of returning from winter quarters, leaving theoretically time for a second brood.[17][29] In the subtropical montane forest of northwestern Argentina and similar habitat, the southern house wren breeds in the rainy summer months from late October to late December.[27]

In Washington, D.C. area, northern house wren parents made significantly more feeding trips per hour in suburban backyards compared to rural backyards. Yet rural nestlings grew at a faster rate than their suburban counterparts. In addition, suburban parents spent less time brooding (sitting on the nest) compared to rural parents. Such results suggest that suburban backyard habitats offer house wrens food for nestlings that is inferior in either quality or quantity to what rural habitats offer. Food items may, for example, be smaller in suburban habitats, and force adults to make more trips to the box.[30]

Conservation status

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The house wren may have been displaced somewhat in some northern parts of its range by the introduction of the house sparrow, but is still common and widespread throughout most of North America. It is not considered threatened by the IUCN.[1]

In culture

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John James Audubon illustrates the house wren in Birds of America (published, London 1827–38) as Plate 83. The image was engraved and colored by the Robert Havell, London workshops.

Troglodytes Aedon was one of the two pets of King Friday the XIII in Mister Rogers' Neighborhood. Trog, as the King called him, was a wooden wren on a stick, and Trog had his own song. King Friday's other pet was a mockingbird (a wooden mockingbird on a stick) named Mimus Polyglottos (see Neighborhood of Make-Believe).

References

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  1. ^ a b BirdLife International (2017) [amended version of 2016 assessment]. "Troglodytes aedon". IUCN Red List of Threatened Species. 2017: e.T103886826A111242743. Retrieved 7 April 2021.
  2. ^ Vieillot, Louis Pierre (1807). Histoire naturelle des oiseaux de l'Amérique Septentrionale : contenant un grand nombre d'espèces décrites ou figurées pour la première fois (in French). Vol. 2. Paris: Chez Desray. pp. 52–55, Plate 107. Although the title page bears the year 1807, the volume was not publish until 1809. See: Dickinson, E.C.; Overstreet, L.K.; Dowsett, R.J.; Bruce, M.D. (2011). Priority! The Dating of Scientific Names in Ornithology: a Directory to the literature and its reviewers. Northampton, UK: Aves Press. p. 157. ISBN 978-0-9568611-1-5.
  3. ^ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 32. ISBN 978-1-4081-2501-4.
  4. ^ Oberholser, Harry C. (1934). "A revision of the North American House Wrens" (PDF). Ohio Journal of Science. 34 (2): 86–96 [87].
  5. ^ Mayr, Ernst; Greenway, James C. Jr, eds. (1960). Check-list of Birds of the World. Vol. 9. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 422.
  6. ^ Wilson, Alexander (1808). American Ornithology; or, the Natural History of the Birds of the United States: Illustrated with Plates Engraved and Colored from Original drawings taken from Nature. Vol. 1. Philadelphia: Bradford and Inskeep. p. 129.
  7. ^ Banks, Richard C.; Browning, M. Ralph (1995). "Comments on the status of revived old names for some North American birds". The Auk. 112 (3): 633-648 [638]. doi:10.1093/auk/112.3.633.
  8. ^ Commission of the International Code of Zoological Nomenclature (1998). "Opinion 1893 (Case 2969) Bombycilla cedrorum Vieillot, (1808) and Troglodytes aedon Vieillot, (1809) (Aves, Passeriformes): specific names conserved". Bulletin of Zoological Nomenclature. 55 (1): 62–63.
  9. ^ a b Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2024). "Dapple-throats, sugarbirds, fairy-bluebirds, kinglets, hyliotas, wrens & gnatcatchers". IOC World Bird List Version 14.2. International Ornithologists' Union. Retrieved 8 October 2024.
  10. ^ Klicka, J.; Epperly, K.; Smith, B.T.; Spellman, G.M.; Chaves, J.A.; Escalante, P.; Witt, C.C.; Canales-del-Castillo, R.; Zink, R.M. (2023). "Lineage diversity in a widely distributed New World passerine bird, the House Wren". Ornithology. 140 (3): ukad018. doi:10.1093/ornithology/ukad018.
  11. ^ Chesser, R.T.; Billerman, S.M.; Burns, K.J.; Cicero, C.; Dunn, J.L.; Hernández-Baños, B.E.; Jiménez, R.A.; Johnson, O.; Kratter, A.W.; Mason, N.A.; Rasmussen, P.C.; Remsen, J.V.J. (2024). "Sixty-fifth Supplement to the American Ornithological Society's Check-list of North American Birds". Ornithology. 141 (3): ukae019. doi:10.1093/ornithology/ukae019.
  12. ^ House Wren, Life History, Cornell Lab of Ornithology. Allaboutbirds.org. Retrieved on 2013-03-18.
  13. ^ Brewer, David & Sean McMinn (2001). Wrens, Dippers, and Thrashers: A Guide to the Wrens, Dippers, and Thrashers of the World. Yale University Press. ISBN 978-0300090598.
  14. ^ Peterson, Roger Tory (1947). A Field Guide to the Birds: Eastern Land and Water Birds, Houghton Mifflin Co., Boston, p. 121.
  15. ^ VanderGaast, Jay & Jaramillo, Alvaro (2005). Field Guides Incorporated Trip List – Lesser Antilles April 9, 2005 to April 23, 2005 Archived April 8, 2008, at the Wayback Machine.
  16. ^ Brumfield, Robb T.; Capparella, A. P. (July 1996). "Genetic Differentiation and Taxonomy in the House Wren Species Group" (PDF). The Condor. 98 (3): 547–556. doi:10.2307/1369567. JSTOR 1369567.
  17. ^ a b Ohio Ornithological Society (2004). Annotated Ohio state checklist Archived 2004-07-18 at the Wayback Machine
  18. ^ "Troglodytes aedon (House wren)". Animal Diversity Web.
  19. ^ "House Wren | Audubon Field Guide". Retrieved 2024-04-20.
  20. ^ Machado, C.G. (1999). A composição dos bandos mistos de aves na Mata Atlântica da Serra de Paranapiacaba, no sudeste brasileiro [Mixed flocks of birds in Atlantic Rain Forest in Serra de Paranapiacaba, southeastern Brazil]. Revista Brasileira de Biologia 59(1): 75–85 [Portuguese with English abstract]. doi:10.1590/S0034-71081999000100010
  21. ^ Jean-Claude Belles-Isles and Jaroslav Picman (1986). "Nesting Losses and Nest Site Preferences in House Wrens" (PDF). The University of New Mexico.
  22. ^ McCabe, Robert A. (1965). "Nest Construction by House Wrens" (PDF). The University of New Mexico.
  23. ^ Krieg, CA; Getty, T (2016). "Not just for males: females use song against male and female rivals in a temperate zone songbird". Animal Behaviour. 113: 39–47. doi:10.1016/j.anbehav.2015.12.019.
  24. ^ Renkl, Margaret (July 2016). "Red in Beak and Claw". The New York Times.
  25. ^ a b Kroodsma, D.E. & Brewer, D. (2005). Troglodytidae. pp.356–447 in: del Hoyo, J.; Elliott, A. & Christie, D.A. (2005). Handbook of the Birds of the World. Vol. 10. Cuckoo-shrikes to Thrushes. Lynx Edicions, Barcelona. ISBN 84-87334-72-5
  26. ^ "Wren (Troglodytes troglodytes)". Garden Bird - Quality Bird Food Supplier. 14 March 2017.
  27. ^ a b Auer, Sonya K.; Bassar, Ronald D.; Fontaine, Joseph J.; Martin, Thomas E. (2007). "Breeding biology of passerines in a subtropical montane forest in Northwestern Argentina". Condor. 109 (2): 321–333. doi:10.1650/0010-5422(2007)109[321:BBOPIA]2.0.CO;2. S2CID 3675989.
  28. ^ Brown, J. (2001). Troglodytes aedon, Animal Diversity Web. Accessed March 18, 2013.
  29. ^ Henninger, W.F. (1906). "A preliminary list of the birds of Seneca County, Ohio" (PDF). Wilson Bulletin. 18 (2): 47–60.
  30. ^ Newhouse, M.; Marra, P. P. & Johnson, L. S. (2008). "Reproductive Success of House Wrens in Suburban and Rural Land-Use Areas" (PDF). The Wilson Journal of Ornithology. 120: 99–104. doi:10.1676/06-156.1. S2CID 56553553. Archived from the original (PDF) on 2013-04-23.
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