Carolina Wrens
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The Carolina Wrens (Thryothorus ludovicianus): State bird for South Carolina.
Distribution / Range:
The Carolina Wren is a common species of wren resident in the eastern half of the USA, the extreme south of Ontario and Quebec, Canada, and the extreme northeast of Mexico. A separate population in the Yucatan Peninsula of Mexico and Belize is treated either as a race Thryothorus ludovicianus albinucha, or sometimes as a separate species, White-browed Wren Thryothorus albinucha. Populations in Canada and the northern half of the US experience regular crashes following severe winters, but their high breeding productivity soon results in a return to higher numbers. These birds are generally permanent residents throughout their range and defend territory year round; some birds may wander north after the breeding season. These birds prefer sites with dense undergrowth, either in mixed forests or in wooded suburban settings, in a natural or artificial cavity.
Description:
It is a fairly large wren, of the US species, second largest after the Cactus Wren, typically 14 cm long and about 20 g weight. The upperparts are rufous brown, and the underparts a strong orange-buff, usually unmarked but faintly barred on the flanks in the southwest of the range. The head has a striking pure white supercilium (eyebrow) and a whitish throat. The race albinucha is duller brown above has additional white streaking on the head. It is easiest to confuse with the Bewick's Wren, which differs in being smaller but with a longer tail, grayer-brown above and whiter below.
Identification Tips:
- Length: 4.75 inches
- Long, thin, slightly decurved bill
- Bold white supercilium
- Rusty upperparts
- White throat and buffy underparts
- Wings and tail barred with black
- Thin white wing bars
- Long tail frequently held upright
- Pink legs
- Sexes similar
- Usually very vocal and loud
- Similar Species: The Carolina Wren is similar to the Bewick's and Marsh Wrens but has buffy, not white, underparts and rustier upperparts. House Wren has a less distinct supercilium, less rusty upperparts and barring on the belly and undertail coverts. Winter Wren is smaller, darker, has a shorter tail and less distinct supercilium.
Call / Song:
The Carolina Wren is noted for its loud song, popularly rendered as "teakettle-teakettle-teakettle". Both male and female birds sing.
Nesting:
The nest is a bulky, often domed structure, with a small hole towards the top. Nests of the more domestically-inclined wrens have been reported in a great variety of nooks and crannies in, about, or under buildings of various kinds, under bridges, or in holes in any structure such as a fence-post, tree, house or barn. Almost any kind of receptacle may offer an acceptable nesting site. Pairs may mate for life. Females typically lay between four to six eggs (normally over a period of several days) up to three times per year (but normally only twice). Eggs are oval, grayish-white and sprinkled with reddish-brown spots. Incubation is performed by the female only and lasts anywhere from 12-14 days, with the first young leaving the nest 12-14 days after hatching. Both the male and female feed the young.
Diet:
These birds eat insects, found in leaf litter or on tree trunks; they may also eat small lizards or tree frogs. In winter, they occasionally eat seeds, berries, and other small fruits.
(Sources: http://en.wikipedia.org and USGS; Ref.: Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.)
Related Web Resources: Chipper Woods Bird Observatory ... Cornell University ... Birds of Nova Scotia ... Mangoverde ... Oiseaux.net
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