Sedge wren

The sedge wren (Cistothorus stellaris) is a small and secretive passerine bird in the Troglodytidae family. It is widely distributed in North America. It is often found in wet grasslands and meadows where it nests in the tall grasses and sedges and feeds on insects. The sedge wren was formerly considered as conspecific with the non-migratory grass wren of central and South America.

Sedge wren
Sedge Wren (31204304001)
In Prairie State Park, Missouri
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Troglodytidae
Genus: Cistothorus
Species:
C. stellaris
Binomial name
Cistothorus stellaris
Cistothorus stellaris map

Taxonomy

The sedge wren was described by the German ornithologist Johann Friedrich Naumann in 1823 under the binomial name Troglodytes stellaris. The type locality is Carolina.[2][3] The current genus Cistothorus was introduced by the German ornithologist Jean Cabanis in 1850.[4] The sedge wren and the grass wren were formerly treated as conspecific. They were split based on the results of a molecular phylogenetic study published in 2014.[5][6] The sedge wren is monotypic.[6]

The sedge wren was formerly known as the short-billed marsh wren but was renamed to better distinguish it from the marsh wren.[7]

Description

The sedge wren is a relatively small wren that measures 10 to 12 cm (3.9 to 4.7 in), weighs 7 to 10 g (0.25 to 0.35 oz) and has a wing-chord of 4.1 to 4.6 cm (1.6 to 1.8 in). Females and males have the same plumage but males are slightly larger.[7] Their head and back are tawny brown streaked with black and white.[7][8] They have a pale buff supercilium and brown irises.[7] Their rump is orange and tail is tawny brown bared with black. Wings are tawny brown bared with black, white and pale buff. They have a white throat and belly with pale buff on the side.[7][8] Their beak is long and slender.[8] and measures on average 6.77 to 6.95 mm [7] The upper mandible of the beak is brown while the lower mandible is yellow. They have pink legs and feet.[7] Juveniles are overall similar to adults but have less streaking on the head and nape and their chest is paler than adults.[7][8] The sedge wren can be differentiated from the similar marsh wren (Cistothorus palustris) by its smaller size, streaked crown and different song.[7]

Distribution and habitat

Distribution

During the breeding season they are found in the southern half of Alberta and Saskatchewan and in southern Ontario and Quebec in Canada and in the United States, west of the Appalachians, from the Canadian border to Missouri and northern Arkansas. During migration and winter they are found from the southern half of Arkansas down to Texas and Florida.[7]

Sedge Wren (Cistothorus stellaris) (22276100980)
Sedge wren in tall vegetation

Habitat

During the breeding season, sedge wrens generally occupy meadows and wet grasslands.[9][10][11][12] They can however live in wetter areas such as marshes[13] and dryer habitat such as dry prairies.[11] They prefer areas with dense and tall grasses and sedges to build their nests.[9][14][15]

During winter, migratory sedge wrens can be found in a variety of habitat as long as there are sufficient insects to eat.[16][17] For example, they can be found in pine savannas,[16] dry prairies,[17] meadows,[7] marshes,[7] and bogs.[7]

Behavior

Vocalizations

Songs usually last 1.5 to 2 seconds and start with 3 to 4 high notes or staccato chips followed by a series of thrills.[7][8] While both male and females can produce calls, only the males sing.[7] Males sing from late winter to early spring on non-breeding grounds and throughout the breeding season to attract mates.[7][18] They sing both during the day and the night.[7] While males usually sing to attract females, they can also engage in countersinging, where a male will respond to another male's song. A male will usually answer the other male with a different song type and frequently change song types during the interaction. Both males also usually sing faster during countersinging. It is hypothesized that they do so to send the maximum amount of stimuli to the listener whether it be a male or a potential mate.[18]

Improvisation

Sedge wrens improvise their songs rather than learning them from other birds. Lab and field observations demonstrated that males had large ranges of individually unique songs and that their songs were poor imitations of the same template songs. There was also very little song sharing among males. This large variation results from the tendency of North American sedge wrens to move often. North American sedge wrens are nomadic breeders compared to their sedentary central and South American relatives.[19] They breed where moist meadows and grasslands are available and they may not return to the same locations the next year if conditions are not right.[19] Furthermore, adult birds may switch locations after raising their first brood to go to wetter areas. There is thus a lot of movement and mixing of populations and birds rarely have the same neighbor twice. Therefore, there is no selection for a precise imitation of the neighboring birds and variations arise in the males' songs. Moreover, because their songs vary so much naturally, it decreases the overall variation over large geographic scales and wrens from all over North America can communicate with each other regardless of which population they came from.[19]

Diet

Sedge wren forage on the ground for insects and spiders.[14][15] They eat many types of insects such as moths, flies and grasshoppers.[15]

Migration

Sedge wrens are short-distance[7] and nocturnal migrants.[20][21] They leave their wintering grounds between early April and mid-May and usually arrive at their breeding grounds between mid-April and mid-May. They will typically leave their breeding grounds when frost reduces significantly the abundance of insects.[14] They depart anywhere from August in the northern part of their range to the end of October in the central states to arrive in their wintering grounds starting in early September.[7]

Dual breeding migration

There is some evidence that some sedge wrens may go through a second migration during the breeding season to breed at a second location. Sedge wrens were observed arriving and breeding from mid to late summer in the Central Plains of the United States and in Iowa where they were previously absent in early summer.[11][18] It is however not actually known if these birds bred somewhere else before. There are several hypotheses to explain this potential second migration. One hypothesis is that these birds are coming from the northern part of their range where shorter summers prevents them from having a second brood in the same location. Another similar hypothesis is that these birds come from various locations where the environmental conditions changed and were no longer suitable for raising a second brood. A final hypothesis is that males that were not able to breed at their previous location relocate to the central plains. They will then wait for the arrival of females that are relocating and try to breed with them.[11]

Reproduction

Some males are polygynous while others are monogamous.[12][22] Polygynous males are usually more successful than monogamous males because breeding with multiple females increases their number of offspring.[12] Males arrive earlier than females at breeding sites to establish territories[14] and the ones defending territories with more nesting sites and food usually attract more females.[12] Males are also the ones building the nests. They build multiple nests which serve for nesting, as dormitories and as decoys for predators. The females will then add a lining of grass, sedge and feathers to the nest she chooses.[12] Nests are round globes of dried grass with a round opening on the side. They are usually built in grasses and sedges about one or two feet above ground or shallow water.[10] Females usually lay seven eggs but it can vary from one to ten eggs which she incubates for 12–16 days.[10][12][14][22] The eggs are oval shaped with no markings[10] and measure on average 16 by 12 mm (0.63 by 0.47 in).[10][22] The young hatchlings are altricial.[7] The females do most of the parental care and feeding whilst the males continue to build nests and display for other females.[12][14] However, males will also occasionally feed the young.[14] The young leave the nest after 11–16 days.[14][22] Some early breeding females can also have a second brood later in the season.[12]

References

  1. ^ BirdLife International (2016). "Cistothorus stellaris". IUCN Red List of Threatened Species. International Union for Conservation of Nature. Retrieved 30 December 2017.
  2. ^ Naumann, Johann Friedrich (1823). Johann Andreas Naumann's Naturgeschichte der Vögel Deutschlands. Volume 3. Leipzig: G. Fleischer. Table facing p. 724.
  3. ^ Mayr, Ernst; Greenway, James C. Jr, eds. (1960). Check-list of Birds of the World. Volume 9. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 391.
  4. ^ Cabanis, Jean (1850). Museum Heineanum : Verzeichniss der ornithologischen Sammlung des Oberamtmann Ferdinand Heine, auf Gut St. Burchard vor Halberstadt (in German). Volume 1. Halbertstadt: In Commission bei R. Frantz. p. 77.
  5. ^ Robbins, Mark B.; Nyári, Árpád S. (2014). "Canada to Tierra del Fuego: species limits and historical biogeography of the Sedge Wren (Cistothorus platensis)". Wilson Journal of Ornithology. 126 (4): 649–662. doi:10.1676/13-162.1.
  6. ^ a b Gill, Frank; Donsker, David, eds. (2017). "Dapple-throats, sugarbirds, fairy-bluebirds, kinglets, hyliotas, wrens & gnatcatchers". World Bird List Version 7.3. International Ornithologists' Union. Retrieved 29 December 2017.
  7. ^ a b c d e f g h i j k l m n o p q r s t "Sedge Wren - | Birds of North America Online". birdsna.org. Retrieved 2017-10-06.
  8. ^ a b c d e Sibley, DA (2016). Sibley Field Guide to Birds of Eastern North America. New York: Alfred A. Knopf. pp. 302–303. ISBN 978-0-307-95791-7.
  9. ^ a b Robert, Michel; Jobin, Benoît; Latendresse, Claudie; Giguère, Sylvain; Shaffer, François (2009). "Habitat use by Sedge Wrens in Southern Québec". Wilson Journal of Ornithology. 121 (2): 347–358. doi:10.2307/20616906. JSTOR 20616906.
  10. ^ a b c d e Bent, Arthur Cleveland (1948). Life histories of North American nuthatches, wrens, thrashers and their allies;order Passeriformes. Washington: U.S. Government. pp. 265–276.
  11. ^ a b c d Bedell, Paul A. (1996). "Evidence of dual breeding ranges for the Sedge Wren in the Central Great Plains" (PDF). Wilson Bulletin. 108 (1): 115–122. doi:10.2307/4163643. JSTOR 4163643.
  12. ^ a b c d e f g h Burns, Jeffrey T. (1982). "Nests, territories, and reproduction of Sedge Wrens (Cistothorus platensis)" (PDF). Wilson Bulletin. 94 (3): 338–349. doi:10.2307/4161644. JSTOR 4161644.
  13. ^ Manci, Karen M.; Rusch, Donald H. (1988). "Indices to distribution and abundance of some inconspicuous waterbirds on Horicon Marsh (Indices de Distribución y Abundancia de Aves Inconspicuas de Área Anegadiza Horicon)". Journal of Field Ornithology. 59 (1): 67–75. doi:10.2307/4513297. JSTOR 4513297.
  14. ^ a b c d e f g h Schramm, P.; Schramm, D.S.; Johnson, S.G. (1986). "Seasonal phenology and habitat selection of the Sedge Wren Cistothorus platensis in a restored tallgrass prairie". Proceedings of the Ninth North American Prairie Conference (PDF). Fargo, North Dakota: Tri-College University Center for Environmental Studies. pp. 95–99.
  15. ^ a b c Walkinshaw, Lawrence H. (1935). "Studies of the Short-Billed Marsh Wren (Cistothorus stellaris) in Michigan" (PDF). The Auk. 52 (4): 362–369. doi:10.2307/4077509. JSTOR 4077509.
  16. ^ a b Brooks, Matthew E.; Stouffer, Philip C. (2011). "Interspecific variation in habitat preferences of grassland birds wintering in southern pine savannas". Wilson Journal of Ornithology. 123 (1): 65–75. doi:10.2307/23033484. JSTOR 23033484.
  17. ^ a b Butler, Adam B.; Martin, James A.; Palmer, William E.; Carroll, John P. (2009). "Winter use of South Florida dry prairie by two declining grassland passerines". The Condor. 111 (3): 511–522. doi:10.1525/cond.2009.080080. JSTOR 10.1525/cond.2009.080080.
  18. ^ a b c Kroodsma, Donald E.; Verner, Jared (1978). "Complex singing behaviors among Cistothorus wrens" (PDF). The Auk. 95 (4): 703–716. doi:10.2307/4085357.
  19. ^ a b c Kroodsma, D.E.; Liu, W.C.; Goodwin, E.; Bedell, P.A. (1999). "The ecology of song improvisation as illustrated by North American Sedge Wrens" (PDF). The Auk. 116 (2): 373–386. doi:10.2307/4089372. JSTOR 4089372.
  20. ^ Graber, Richard R. (1968). "Nocturnal migration in Illinois: different points of view" (PDF). Wilson Bulletin. 80 (1): 36–71. doi:10.2307/4159682. JSTOR 4159682.
  21. ^ Taylor, Walter Kingsley; Crawford, Robert L.; Kershner, Mark; Gravel, Sandy (1983). "House wren migration compared with other wrens: an emphasis on Florida". Journal of Field Ornithology. 54 (1): 17–28. doi:10.2307/4512783. JSTOR 4512783.
  22. ^ a b c d Crawford, Richard D. (1977). "Polygynous breeding of Short-Billed Marsh Wrens" (PDF). The Auk. 94 (2): 359–362. doi:10.2307/4085101. JSTOR 4085101.

External links

Alfred Bog

The Alfred Bog is a domed peat bog in Eastern Ontario, Canada, about 7 kilometres (4.3 mi) south of Alfred and 70 kilometres (43 mi) east of Ottawa. The bog is considered the largest high-quality bog in Southern Ontario, and was designated by the Ontario Ministry of Natural Resources as a "Class 1 Wetland" and an "Area of Natural and Scientific Interest (ANSI)" in 1984. It is home to rare animal species and a healthy moose population.The wetland, primarily consisting of bog as well as some marsh and swamp, is 10,200 acres (4,100 ha) in size of which 90% is protected as a nature preserve. The bog is accessible by a 273-metre (896 ft) long boardwalk.

American goldfinch

The American goldfinch (Spinus tristis) is a small North American bird in the finch family. It is migratory, ranging from mid-Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter.

The only finch in its subfamily to undergo a complete molt, the American goldfinch displays sexual dimorphism in its coloration; the male is a vibrant yellow in the summer and an olive color during the winter, while the female is a dull yellow-brown shade which brightens only slightly during the summer. The male displays brightly colored plumage during the breeding season to attract a mate.

The American goldfinch is a granivore and adapted for the consumption of seedheads, with a conical beak to remove the seeds and agile feet to grip the stems of seedheads while feeding. It is a social bird, and will gather in large flocks while feeding and migrating. It may behave territorially during nest construction, but this aggression is short-lived. Its breeding season is tied to the peak of food supply, beginning in late July, which is relatively late in the year for a finch. This species is generally monogamous, and produces one brood each year.

Human activity has generally benefited the American goldfinch. It is often found in residential areas, attracted to bird feeders which increase its survival rate in these areas. Deforestation also creates open meadow areas which are its preferred habitat.

Braddock Bay

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Cistothorus

Cistothorus is a genus of small passerine birds in the Troglodytidae family.

Cobb's wren

Cobb's wren (Troglodytes cobbi) is a fairly small (12-13.5 cm) wren which is endemic to the Falkland Islands. It was formerly classified as a subspecies of the house wren (Troglodytes aedon) but is now commonly considered to be a separate species due to differences in plumage, voice, ecology and morphology.

The scientific and common names commemorate Arthur Cobb, an author from the Falkland Islands.

Fauna of Toronto

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Grass wren

The grass wren (Cistothorus platensis) is a species of passerine bird in the Troglodytidae family. It is widely distributed in central and southern America.

The species was described in 1790 by the English ornithologist John Latham and given the binomial name Sylvia platensis. The type locality is Buenos Aires, Argentina. The current genus Cistothorus was introduced by the German ornithologist Jean Cabanis in 1850. The grass wren and the sedge wren were formerly treated as conspecific. They were split based on the results of a molecular phylogenetic study published in 2014. There are 17 recognised subspecies of the grass wren.

Henslow's sparrow

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Unless otherwise noted, the species on this list are considered to occur regularly in Belize as permanent residents, summer or winter visitors, or migrants. The following tags have been used to highlight several categories. The tags and notes of population status are from Bird Checklists of the World.

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This list is presented in the taxonomic sequence of the Check-list of North American Birds, 7th edition through the 59th Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the Check-list.

Unless otherwise noted, all species listed below are considered to occur regularly in Minnesota as permanent residents, summer or winter visitors, or migrants. The following codes are used to designate some species:

(A) Accidental - "Species for which there are accepted records in no more than two of the past ten years" per the MOURC

(C) Casual - "Species for which there are accepted records in three to eight of the past ten years" per the MOURC

(I) Introduced - Species established in North America as a result of human action

(E) Extinct - a recent species that no longer exists

(Ex) Extirpated - Species which "formerly occurred regularly in the state but disappeared and are not expected to recur" per the MOURC

List of birds of Oklahoma

This list of birds of Oklahoma includes species documented in the U.S. state of Oklahoma and accepted by the Oklahoma Ornithological Society's Bird Records Committee (OBRC). As of October 2017, there were 480 species on the official list. Of them, 120 are classified as accidental, seven have been introduced to North America, two are known to be extinct, and two others might be extinct. An additional 16 species are classed as either hypothetical or of uncertain origin; 13 of them are also classed as accidental.

This list is presented in the taxonomic sequence of the Check-list of North American Birds, 7th edition through the 59th Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the Check-list.

Unless otherwise noted, all species listed below are considered to occur regularly in Oklahoma as permanent residents, summer or winter visitors, or migrants. These tags are used to annotate some species:

(A) Accidental - Species considered rare or accidental by Bird Checklists of the World (the OBRC does not annotate its list with this category)

(I) Introduced - a species introduced to North America by the actions of humans, either directly or indirectly

(E) Extinct - a species that no longer exists

(H) Hypothetical - "species seen in the state and supported only by written documentation" per the OBRC

(UO) Uncertain Origin - species whose provenance is unknown

Marsh wren

The marsh wren (Cistothorus palustris) is a small North American songbird of the wren family. It is sometimes called long-billed marsh wren to distinguish it from the sedge wren, also known as short-billed marsh wren.

Mont-Saint-Bruno National Park

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At the beginning of the 20th century, the mountain became a luxury resort and a sought-after area for the food needs of various religious communities. One of those communities, the Brothers of Christian Instruction of St Gabriel, went as far as building a school and an arboretum for the benefit of the neighboring population. In 1976, the Government of Quebec acquired part of the mountain. It established a park in 1985 that, since 1999, is managed by the Société des établissements de plein air du Québec (SÉPAQ).

The park sees approximately 750,000 visitors yearly, where hiking, cross-country skiing and alpine skiing are amongst the most popular activities enjoyed.

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Wren

The wren is a family of mostly small, brown, passerine birds in the (mainly) New World family Troglodytidae. The family includes 88 species divided into 19 genera. Only the Eurasian wren occurs in the Old World, where in Anglophone regions, it is commonly known simply as the "wren", as it is the originator of the name. The name wren has been applied to other, unrelated birds, particularly the New Zealand wrens (Acanthisittidae) and the Australian wrens (Maluridae).

Most wrens are small and rather inconspicuous, except for their loud and often complex songs. Notable exceptions are the relatively large members of the genus Campylorhynchus, which can be quite bold in their behavior. Wrens have short wings that are barred in most species, and they often hold their tails upright. As far as is known, wrens are primarily insectivorous, eating insects, spiders, and other small arthropods, but many species also eat vegetable matter and some take small frogs and lizards and many more amphibians.

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