|Red List Category & Criteria:
||Butchart, S. & Symes, A.
||Coelho, A., De Luca, A., Diniz, M., Lopes, L., Luiz, É. & Ribon, R.
||Bird, J., Butchart, S., Capper, D., Pople, R., Sharpe, C J & Symes, A.
This species is classified as Endangered because habitat loss and degradation driven by a number of processes are suspected to be causing very rapid ongoing population declines.
|Previously published Red List assessments:|
- 2013 – Endangered (EN)
- 2012 – Endangered (EN)
- 2009 – Endangered (EN)
- 2008 – Critically Endangered (CR)
- 2004 – Critically Endangered (CR)
- 2000 – Critically Endangered (CR)
- 1996 – Endangered (EN)
- 1994 – Endangered (EN)
- 1988 – Threatened (T)
|Range Description:||Phylloscartes roquettei is known from the São Francisco and Jequitinhonha valleys, in north and central Minas Gerais, and in contiguous S Bahia and E Goías, in east-central Brazil. The type-specimen was collected in July 1926 near Januária, now Brejo de Amparo, and birds were seen again in 1977 on both sides of the rio São Francisco (Willis and Oniki 1991). Searches in 1985, 1986 and 1987 were unsuccessful, but the species was located at Várzea da Palma, near Pirapora (c.190 km south of the type-locality) in 1993 and found to be very rare at the site in 1998, 1999, 2002 and 2005 (Raposo et al. 2002; Kirwan et al. 2004; Vasconcelos et al. 2006). A male specimen was taken at Francisco Dumont (c.250 km south of the type-locality) in 1995 (Raposo et al. 2002). An overlooked specimen taken in 1990 at the Fazenda Cana Brava along the rio Pardo Grande has recently come to light (Vasconcelos et al. 2008). It was recorded at the Projeto Jaíba, Mocambinho in September 1996. Recent surveys discovered the species at several new localities along the São Francisco river valley (Lopes et al. 2008) and from the Jequitinhonha river basin (Luiz et al. 2006). These new records increased the known extent of occurrence to 33,500 km2 (Lopes et al. 2008). Conjecture that the species may occur in contiguous habitat in south-west Bahia (de Vasconcelos et al. 2006) was confirmed by dos Santos et al. (2009) who describe five new localities within the state; nesting has also been documented (Albano 2009). There appears to be suitable habitat to the northeast and north-northwest of its current distribution (Marini et al. 2010). The population size has not been assessed; the only previous estimate was based on extrapolation across the known range at the time of just 50 km2, given the revised EOO the population is unlikely to be small. Similarly population trends have not been assessed, but there are a number of severe threats to cerrado habitats within the species's range that suggest a rapid decline is likely. |
|♦ Continuing decline in area of occupancy (AOO):||Unknown|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||316000|
|♦ Continuing decline in extent of occurrence (EOO):||Unknown||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||7||♦ Continuing decline in number of locations:||Unknown|
|♦ Extreme fluctuations in the number of locations:||No||♦ Lower elevation limit (metres):||400|
|♦ Upper elevation limit (metres):||900|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||No empirical data is available, however, despite it apparent low population density and ongoing habitat degradation and fragmentation within the species's range, an extensive area of potentially suitable habitat remains that suggests the previous population estimate of 50-250 individuals needed revision. It is instead estimated to number 2,500-9,999 individuals, equating to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals.|
Trend Justification: Threats to the cerrado are many and varied; particularly so within the species's range. For this reason a very rapid rate of decline is precautionarily suspected, but collection of empirical evidence to clarify this remains a priority,
|Current Population Trend:||Decreasing|
|♦ Number of mature individuals:||1500-7000||♦ Continuing decline of mature individuals:||Unknown|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||Yes|
|♦ No. of subpopulations:||2-100||♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|
|♦ No. of individuals in largest subpopulation:||1-89|