The Clarión wren (''Troglodytes tanneri'') is a species of

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

in the family Troglodytidae. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Clarión Island Clarion Island (), formerly Santa Rosa, is the second largest, westernmost and most remote of Mexico's Revillagigedo Islands. The island is located west of Socorro Island and just under from the Mexican mainland. It has an area of and three ...

off

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

. It looks much like a

house wren The house wren complex has been split into eight species: * Northern house wren, ''Troglodytes aedon'' * Southern house wren, ''Troglodytes musculus'' * Cozumel wren, ''Troglodytes beani'' * Kalinago wren, ''Troglodytes martinicensis'' * St. Lucia w ...

but is larger with a prominently longer bill, somewhat approaching the

Carolina wren The Carolina wren (''Thryothorus ludovicianus'') is a common species of wren that is a resident in the Eastern United States, the extreme south of Ontario, Canada, and the extreme northeast of Mexico. Severe winters restrict the northern limits ...

in form. Its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

s are the less

arid Aridity is the condition of geographical regions which make up approximately 43% of total global available land area, characterized by low annual precipitation, increased temperatures, and limited water availability.Perez-Aguilar, L. Y., Plata ...

patches of

shrubland Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominance (ecology), dominated by shrubs, often also including grasses, herbaceous plant, herbs, and geophytes. Shrubland may either occur naturally o ...

, notably thickets of '' Ipomoea halierca''

morning glory Morning glory (also written as morning-glory) is the common name for over 1,000 species of flowering plants in the family Convolvulaceae, whose taxonomy and systematics remain in flux. These species are distributed across numerous genus, gene ...

. It also appears to occur in the garrison buildings and garden at Sulfur Bay, but usually avoids the rocky shores and other exposed areas. In dense undergrowth, territories are some 10 meters (30–40 ft) in diameter. In late March 1953, males were found to be singing and threatening intruding competitors. Egg laying takes place between mid-March and mid-April. The eggs are similar to those of the house wren, but larger and more elongated. They measure approximately 20×14 mm and also are colored basically like those of house wrens but with fewer and crisper markings noticeably denser at the blunt end.

References

Clarión wren Natural history of the Revillagigedo Islands Endemic birds of Western Mexico Clarión wren Clarión wren Taxonomy articles created by Polbot {{Troglodytidae-stub