Strange-tailed Tyrant (Alectrurus risora)

Other Scientific Names
Alectrurus risorus [Stotz et al. (1996)], Yetapa risoria [Collar and Andrew (1988)]

Family
Tyrannidae (Tyrant-flycatchers)

Size
20 - 30 cm

First Described (Guide)
(Vieillot, 1824)

Habitat
Wet grasslands near or within marshes. From sea-level - 500 m.

Range (Guide)

Argentina (B), Brazil (B), Paraguay (B), Uruguay (B).

Southern Brazil (locally southern Mato Grosso, S�o Paulo, Rio Grande do Sul), northern Argentina (eastern Formosa and Misiones south to C�rdoba and northern Buenos Aires), eastern Paraguay and Uruguay.

Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.

Population
Estimated population is 10,000 - 19,999 (2010) and decreasing.

Status VU
Grassland habitat destruction and degradation through agricultural development, livestock-farming, plantations, are the main threats.

For more information see BirdLife International Species Factsheet.

Habits
Gregarious. Commonly found in groups of 20 and exceptionally up to 50 birds.

Food
Invertebrates.

Voice
Mostly silent. Some inconspicuous calls.

Xeno-Canto Sound Files (more (1)...)

Strange-tailed Tyrant (Alectrurus risora) [XC389783]
by id from Mercedes, Corrientes, Argentina (call)

Strange-tailed Tyrant (Alectrurus risora) [XC70492]
by Bernabe Lopez-Lanus from Estancia San Alonso (CLT), Ibera, Corrientes, Argentina (flight call, female fight flight calls)

Subspecies
No subspecies.

Genus appears to be most closely allied to Fluvicola and Arundinicola. Formerly placed in a monotypic genus, Yetapa, on basis primarily of exaggerated tail and elongated hallux. However, it does have very similar plumage pattern to that of Cock-tailed Tyrant (Alectrurus tricolor), with which it shares highly modified outer rectrices and numerous other derived features unique within the family.

Similar Species
Individuals lacking tail-streamers resemble Cock-tailed Tyrant (Alectrurus tricolor), but only Strange-tailed Tyrant (Alectrurus risora) has complete breast-band.

References
See References.

Files:

More Information

BirdLife International

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BirdLife International Species Factsheet.

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