||Sitta formosa Blyth, 1843
||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.
||16.5 cm. Dazzling, large nuthatch. Black upperside with brilliant blue to white streaks on crown, nape and mantle, broad blue band along scapulars to back and rump and two narrow, white wing-bars. Dull rufous-buff underparts with paler throat and head-sides. Voice Rapid high, tremulous chit'it'it'it'it'it'it'it and shorter, hesitant chit-it chit-it chit-it and chit'it-it, chirririt-it. Hints Check mixed-species flocks foraging in large trees at high altitude.
|Red List Category & Criteria:
||Butchart, S. & Symes, A.
||Benstead, P., Gilroy, J., Westrip, J.
This nuthatch has a small, declining, severely fragmented population as a result of loss, degradation and fragmentation of evergreen and semi-evergreen forest. It therefore qualifies as Vulnerable.
|Previously published Red List assessments:|
- 2012 – Vulnerable (VU)
- 2008 – Vulnerable (VU)
- 2004 – Vulnerable (VU)
- 2000 – Vulnerable (VU)
- 1996 – Vulnerable (VU)
- 1994 – Vulnerable (VU)
- 1988 – Threatened (T)
|Range Description:||Sitta formosa has a broad range encompassing Bhutan, north-east India (with recent records from Arunachal Pradesh, Nagaland and northern West Bengal [A. Choudhury in litt. 2016]), west, north and east Myanmar, south-east Yunnan, China, East (Vogel et al. 2003) and West Tonkin, north Vietnam, and north and central Laos, with a few records from extreme north-west Thailand. It is rare and very locally distributed throughout this range. Recent records suggest that Bhutan, Arunachal Pradesh in India, north Myanmar and Laos support the most important populations. |
Bhutan; China; India; Lao People's Democratic Republic; Myanmar; Thailand; Viet Nam
|♦ Continuing decline in area of occupancy (AOO):||Yes|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||1160000|
|♦ Continuing decline in extent of occurrence (EOO):||Yes||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||11-100||♦ Continuing decline in number of locations:||Yes|
|♦ Extreme fluctuations in the number of locations:||No||♦ Lower elevation limit (metres):||600|
|♦ Upper elevation limit (metres):||2400|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The population is estimated to number 2,500-9,999 mature individuals, based on an assessment of recent records and surveys by BirdLife International (2001). This equates to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.|
Trend Justification: A moderate population decline is suspected to be on-going, owing to the moderately rapid loss and degradation of habitats across the range.
|Current Population Trend:||Decreasing|
|♦ Number of mature individuals:||2500-9999||♦ Continuing decline of mature individuals:||Yes|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||Yes|
|♦ No. of subpopulations:||2-100||♦ Continuing decline in subpopulations:||Yes|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|