||Notiomystis cincta (Du Bus & Gisignies, 1839)
||Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
||18 cm. Small, sexually dimorphic passerine. Male, distinctive velvet-black head, back, upper breast. White erectile ear-tufts. Black underlined on breast with golden-yellow. Black wings with golden-yellow shoulder patches, white wing-bars. Remainder of underparts pale brown. Female, grey-brown with white wing-bar. Some females have small, non-distinctive white ear-tufts. Voice Male, loud explosive whistle see-si-ip, low warbling song of up to three minutes. Alarm calls stitch, whee whee whee.
|Red List Category & Criteria:
||Butchart, S. & Symes, A.
||Armstrong, D.P., Boyd, S., Brekke, P., Castro, I., Ewen, J. & Richardson, K.
||Benstead, P., Bird, J., Butchart, S., Khwaja, N., McClellan, R., Taylor, J., Symes, A., Wheatley, H.
This species is classified as Vulnerable because it has a very small range and population and is therefore susceptible to stochastic events and the impacts of human activities, such as the introduction of non-native predators. Intensive conservation efforts aim to improve its status, but these have resulted in only partial success with at least three of the four remaining translocated populations requiring intensive and on-going management and the fourth currently at an early stage of establishment with uncertainty about its long-term survival.
|Previously published Red List assessments:|
- 2016 – Vulnerable (VU)
- 2013 – Vulnerable (VU)
- 2012 – Vulnerable (VU)
- 2008 – Vulnerable (VU)
- 2007 – Vulnerable (VU)
- 2004 – Vulnerable (VU)
- 2000 – Vulnerable (VU)
- 1996 – Vulnerable (VU)
- 1994 – Vulnerable (VU)
- 1988 – Threatened (T)
|Range Description:||Notiomystis cincta was once widespread over the North Island and adjacent offshore islands of New Zealand . Little Barrier Island (31 km2) is now the last natural population, with a minimum estimate of 3,000 birds. Translocated populations exist, with 150 adults on Kapiti (20 km2), 150 birds on Tiritiri Matangi (2 km2) Island, 65 birds at Karori Wildlife Sanctuary (2.25 km2) on the main North Island and about 71 birds at Maungatautari (34 km2), also on the main North Island (J. Ewen, K. Richardson and P. Brekke in litt. 2012). Population estimates are of adult birds at the start of the 2011/2012 Southern Hemisphere breeding season. None of the translocated populations are self-sustaining and most are only increasing as a result of intensive and on-going management including supplementary feeding and predator control at all sites, and the provision of nesting boxes and parasite control at most sites (Armstrong & Ewen 2001, Armstrong et al. 2002, Chauvenet et al. 2012).|
|♦ Continuing decline in area of occupancy (AOO):||Unknown|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||22300|
|♦ Continuing decline in extent of occurrence (EOO):||Unknown||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||5||♦ Continuing decline in number of locations:||Unknown|
|♦ Extreme fluctuations in the number of locations:||No|
|♦ Upper elevation limit (metres):||750|
|Range Map:||Click here to open the map viewer and explore range.|
The population is estimated to number a minimum of 3,000 mature individuals, assumed to equate to a total population of over 4,500 individuals, based on an estimated minimum of 3,000 mature individuals from distance sampling on Little Barrier (Department of Conservation unpublished report 2012, per J. Ewen, K. Richardson and P. Brekke in litt. 2012). Population estimates from each translocated population in 2011/2012 sum to c.430 adults (Department of Conservation unpublished reports 2012), but these are not counted in the total since it is uncertain how many translocated birds have bred successfully in the wild and can therefore be counted as mature individuals sensu IUCN.
Trend Justification: No comprehensive surveys have estimated population trends on Little Barrier, where the only natural and self-sustaining population remains. However, it is not thought to be in decline there, although confirmation is needed.
|Current Population Trend:||Stable|
|♦ Number of mature individuals:||3000||♦ Continuing decline of mature individuals:||Unknown|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||Yes|
|♦ No. of subpopulations:||5||♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|