Troglodytes

Troglodytes is a genus of small passerine birds in the wren family. These wrens are around 11 - 13 cm long. They are brownish above and somewhat paler below, with strong legs. Their short rounded wings and frequently cocked tail have a dark barred pattern. The flight is direct and buzzing.

Troglodytes wrens are mostly found in somewhat cooler habitats than most of their relatives. Most of the species are found in the mountains from Mexico to northern South America. Five species are found in temperate latitudes: The House Wren occurs widely in both tropical and temperate lowlands, but is frequently split into several species. Until recently, the hardy Winter Wren was believed to have a wide distribution in North America, Europe and Asia, but it has recently been split into three species, of which the Eurasian Wren is the only wren of any genus found outside the New World. The Cobb's Wren of the Falkland Islands is another species which tolerates harsh conditions well.

Like other wrens, they are elusive as they hunt for small insects and spiders, but they readily reveal their positions through their loud songs.

These are territorial birds, but the tiny Winter Wren will roost communally in a cavity in cold weather to help conserve heat.

Systematics and species
The closest living relatives of this genus are possibly the Timberline Wren and the Cistothorus species rather than the Henicorhina wood-wrens as is sometimes proposed.

A number of the Troglodytes species, such as the Clarion Wren, were formerly considered subspecies of the House Wren, and it has been argued that at least the tropical forms of the House Wren should be further split as the Southern House Wren, Troglodytes musculus. The Socorro Wren, in older times placed into Thryomanes (Bewick's Wren), is actually a close relative of the House Wren complex, as indicated by "manners, song, plumage, etc" and by biogeography and mtDNA NADH dehydrogenase subunit 2 sequence analysis.

The Winter Wren is less closely related to the other members of the genus, and is occasionally split as the monotypic genus Nannus. It might actually be closely related to Cistothorus, but again, the molecular data is insufficient to properly resolve this issue.

Species
In early 2010, the American Ornithologist's Union voted to split the species formerly known as Winter Wren into three separate species, as follows
 * House Wren, Troglodytes aedon – taxonomy needs revision
 * Northern House Wren, Troglodytes (aedon) aedon group
 * Brown-throated Wren, Troglodytes (aedon) brunneicollis group
 * Southern House Wren, Troglodytes (aedon) musculus group
 * Cozumel Wren, Troglodytes (aedon) beani
 * Guadeloupe Wren, Troglodytes aedon guadeloupensis – taxonomic status unresolved; possibly extinct (late 20th century)
 * Martinique Wren, Troglodytes aedon martinicensis – taxonomic status unresolved; possibly extinct (c.1890)
 * Clarion Wren, Troglodytes tanneri – formerly included in T. aedon
 * Socorro Wren, Troglodytes sissonii – formerly included in T. aedon
 * Cobb's Wren, Troglodytes cobbi – formerly included in T. aedon
 * Rufous-browed Wren, Troglodytes rufociliatus
 * Tepui Wren, Troglodytes rufulus
 * Mountain Wren, Troglodytes solstitialis
 * Ochraceous Wren, Troglodytes ochraceus
 * Santa Marta Wren, Troglodytes monticola
 * Eastern Winter Wren, Troglodytes hiemalis
 * Eastern Winter Wren, Troglodytes hiemalis hiemalis
 * Southern Winter Wren, Troglodytes hiemalis pullus
 * Pacific Wren, Troglodytes pacificus
 * Pacific Wren, Troglodytes pacificus pacificus
 * Kiska Wren, Troglodytes pacificus kiskensis
 * Aleutian Wren, Troglodytes pacificus meligerus
 * Troglodytes pacificus ochroleucus
 * Tanaga Wren, Troglodytes pacificus tanagensis
 * Seguam Winter Wren, Troglodytes pacificus seguamensis
 * Stevenson's Winter Wren, Troglodytes pacificus stevensoni
 * Unalaska Wren, Troglodytes pacificus petrophilus
 * Semidi Wren, Troglodytes pacificus semidiensis
 * Alaska Wren, Troglodytes pacificus alascensis
 * Troglodytes pacificus muiri
 * Troglodytes pacificus obscurior
 * Troglodytes pacificus salebrosus
 * Kodiak Wren, Troglodytes pacificus helleri
 * Eurasian Wren, Troglodytes troglodytes
 * Northern Wren, Troglodytes troglodytes troglodytes
 * Icelandic Winter Wren, Troglodytes troglodytes islandicus
 * Corsican Winter Wren, Troglodytes troglodytes koenigi
 * British Isles Wren, Troglodytes troglodytes indigenus
 * Fair Isle Winter Wren, Troglodytes troglodytes fridariensis
 * St. Kilda Wren, Troglodytes troglodytes hirtensis
 * Hebridian Winter Wren, Troglodytes troglodytes hebridensis
 * Shetland Wren, Troglodytes troglodytes zetlandicus
 * Faeroes Winter Wren, Troglodytes troglodytes borealis
 * West Mediterranean Winter Wren, Troglodytes troglodytes kabylorum
 * Libyan Winter Wren, Troglodytes troglodytes juniperi
 * East Mediterranean Winter Wren, Troglodytes troglodytes cypriotes
 * Caucasian Winter Wren, Troglodytes troglodytes hyrcanus
 * Daito Winter Wren, Troglodytes troglodytes orii – validity doubtful; extinct (c.1940)
 *  Troglodytes troglodytes dauricus
 * Troglodytes troglodytes idius
 * Troglodytes troglodytes kurilensis
 * Magrath's Wren, Troglodytes troglodytes magrathi
 * Troglodytes troglodytes mosukei
 * Caucasian Wren, Troglodytes troglodytes neglectus
 * Troglodytes troglodytes szetschuanus
 * Troglodytes troglodytes talifuensis
 * Sooty Wren, Troglodytes troglodytes fumigatus
 * Nepal Wren, Troglodytes troglodytes nipalensis
 * Troglodytes troglodytes pallescens
 * Troglodytes troglodytes zagrossiensis
 * Troglodytes troglodytes tianschanicus
 * Troglodytes troglodytes ogawae
 * Troglodytes troglodytes taivanus
 * Troglodytes troglodytes subpallidus

Even with the help of the most recent molecular data the relationships of the species could not be fully resolved however. There appear to be 2 clades, one comprising the house wren group and another containing Central and South American species. The relationships of the Rufous-browed and Brown-throated Wrens are indeterminable with the present molecular data; they appear fairly basal and the former might be closer to the house wren group than the latter. The Santa Marta Wren is quite enigmatic and little-studied.