||Sharp-tailed Tyrant, Sharp-tailed Grass Tyrant, Sharp-tailed Grass-Tyrant
||del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
||11 cm. Small brownish tyrant. Well-marked head with crown black, supercilium white and eyestripe black. Upperparts dark brown, heavily streaked with buff. Brown tail feathers long, slender and pointed. Underparts white with cinnamon flanks. Voice Thin interrogative ree?.....ree?.....
|Red List Category & Criteria:
||Butchart, S. & Symes, A.
||Araujo Guss, C.O., Capper, D., Herrera, M., Hesse, C., Lesterhuis, A., Malacco, G., Minns, J., Olmos, F., Pople, R., da Silva, J. & del Castillo, H.
||Babarskas, M., Capper, D., O'Brien, A., Sharpe, C J, Symes, A.
This species qualifies as Vulnerable because it appears to be undergoing a rapid decline owing to continuing habitat degradation and destruction.
|Previously published Red List assessments:|
- 2012 – Vulnerable (VU)
- 2008 – Vulnerable (VU)
- 2004 – Vulnerable (VU)
- 2000 – Lower Risk/near threatened (LR/nt)
- 1994 – Lower Risk/near threatened (LR/nt)
- 1988 – Threatened (T)
|Range Description:||Culicivora caudacuta occurs in east Bolivia (Beni, La Paz, Santa Cruz), extreme north and south-central Brazil (Amapá, south-west Bahia, south Mato Grosso, Mato Grosso do Sul, central Goiás, Distrito Federal, Minas Gerais, west Paraná, São Paulo), east and south-west Paraguay and north-east Argentina (east Formosa, east Chaco, Corrientes, north Santa Fe, Entre Ríos, south Misiones) (Armonía 1995; Canevari et al. 1991; Hayes 1995; Ridgely and Tudor 1994; Sick 1993; J. M. C. da Silva in litt. 1999; Souza 1999). In Brazil it is found mostly in the upland cerrado of the Planalto Central, Central, a more restricted distribution compared to other cerrado birds. It is now mostly rare and very localised but there are recent range extensions from Entre Ríos (Pearman and Abadie 1995) and La Paz (Parker et al. 1991) and it continues to be observed frequently at known locations in Paraguay. |
Argentina; Bolivia, Plurinational States of; Brazil; Paraguay; Uruguay
|♦ Continuing decline in area of occupancy (AOO):||Yes|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||4310000|
|♦ Continuing decline in extent of occurrence (EOO):||Yes||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Continuing decline in number of locations:||Yes|
|♦ Extreme fluctuations in the number of locations:||No|
|♦ Upper elevation limit (metres):||1400|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Although this species is rare and localised, it has a very large range, and numbers are likely to exceed 10,000 mature individuals. It is thus placed in the band 10,000-19,999 mature individuals, which equates to 15,000-29,999 individuals in total, rounded here to 15,000-30,000 individuals.|
Trend Justification: This species is suspected to be declining rapidly, in line with rates habitat loss within its range.
|Current Population Trend:||Decreasing|
|♦ Number of mature individuals:||10000-19999||♦ Continuing decline of mature individuals:||Yes|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||No|
|♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|
|♦ No. of individuals in largest subpopulation:||100|