Biak Paradise-kingfisher Tanysiptera riedelii


Justification of Red List Category
This species has a very small range, in which habitat is being lost and degraded, although its population is not considered to be severely fragmented or restricted to a few locations. Its population is thought to be moderately small and is likely to be in decline owing to habitat loss. It is therefore considered Near Threatened, although further studies are urgently needed to validate this assessment.

Population justification
This species is poorly known and no population estimates are available.

Trend justification
Data on population trends are lacking, but a slow decline is suspected to be occurring, owing to on-going habitat destruction.

Distribution and population

Tanysiptera riedelii is endemic to the twin islands of Biak-Supiori off Papua (formerly Irian Jaya), Indonesia (Beehler et al. 1986). It is sometimes considered to be a subspecies of Common Paradise-kingfisher T. galeata but there are significant morphological differences (Forshaw 1985, Sibley and Monroe 1990, Sibley and Monroe 1993). It is reported to be fairly common, although it may be restricted to areas of tall forest (K. D. Bishop in litt. 2000).


This species occurs in primary, secondary and logged forest up to at least 300 m, and possibly 600 m (Gibbs 1993, Poulsen and Frolander 1994, Eastwood 1996b, B. Beehler and S. van Balen in litt. 2000, M. Van Beirs in litt. 2000). It may be restricted to areas with tall trees and a closed canopy.


On Biak, forest is under heavy threat from logging and subsistence farming, but there appears to be large areas of forest remaining in interior Supiori (Bishop 1982, K. D. Bishop in litt. 1996, D. Holmes in litt. 2000).

Conservation actions

Conservation Actions Underway
It is present in the 110 km2 Biak-Utara protected area (B. Beehler and S. van Balen in litt. 2000).

Conservation Actions Proposed
Conduct surveys throughout the range to clarify its current abundance and distribution. Repeat surveys to monitor rates of population decline. Conduct ecological studies to identify habitat associations and levels of tolerance of secondary habitats. Ensure the effective protection of tall forest in the Biak-Utara protected area.


Text account compilers
Benstead, P., Gilroy, J. & Taylor, J.

Beehler, B., Bishop, K., Holmes, T., van Balen, S. & van Beirs, M.

Recommended citation
BirdLife International (2020) Species factsheet: Tanysiptera riedelii. Downloaded from http://www.birdlife.org on 23/09/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/09/2020.