Papuan harrier
Circus spilothorax Salvadori & D'Albertis, 1875
The papuan harrier (Circus spilothorax) is a species in the family Accipitridae, order Accipitriformes. Recorded adults weigh 502.2 g to 622.2 g. Source checklists list it for 1 country: Australia. Its IUCN Red List status is Least Concern.
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Quick facts about the papuan harrier
- Weight
- 502.2 g – 622.2 gsrc for Weight
- Length
- Not recorded
- Lifespan
- Not recorded
- Diet
- Carnivoresrc for Diet
- Main food
- Not recorded
- Habitat
- wetlandsrc for Habitat
- Young per litter or clutch
- 4.6src for Young per litter or clutch
- Lifestyle
- Aerialsrc for Lifestyle
- Migration
- Migratorysrc for Migration
- Conservation status
- Least Concern (IUCN)src for Conservation status
- Countries on record
- 1 countrysrc for Countries on record
Where does the papuan harrier live?
Countries where Catalogue of Life checklists list the species. Many checklists carry no country data, so the list is often incomplete. It is not a range map.
The papuan harrier is listed for 1 country.
- Listed
- Not listed
The same countries as a list
Why a country list is not a range map
Listed by: ITIS (scope: global), through the Catalogue of Life.
What is the papuan harrier?
The Papuan harrier (Circus spilothorax) is a bird of prey native to New Guinea which belongs to the harrier genus Circus. It was classified as a subspecies of the eastern marsh harrier (Circus spilonotus) of eastern Asia.
It is thinly scattered across the whole of New Guinea except for the Vogelkop peninsula in the west. There are several unconfirmed reports from Australia but the bird can easily be confused with the swamp harrier. It inhabits grassland and wetlands up to 3800 m above sea-level. It hunts low over open ground searching for small mammals, birds and lizards.
The adult male is usually silvery-grey with black head, throat, back and wing-markings and white underparts. Adult females are brown with a pale rump, barred tail and streaked underparts. Juveniles are blackish-brown with cream-coloured markings on the head, more extensive in the female. The length of the bird varies from 47 to 54 cm; females are larger than the males.
In the central highlands and the Sepik valley there is a dark morph; males of this form are mostly blackish with a grey tail and the females are mostly dark brown.
From the Wikipedia article “Papuan harrier” (en.wikipedia.org/w/index.php?title=Papuan_harrier&oldid=1380703566), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.
Is the papuan harrier endangered?
The papuan harrier is listed as Least Concern on the IUCN Red List: it is not currently at risk of extinction.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- EXExtinct
Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Least Concern species. What the categories mean.
How is the papuan harrier classified?
- kingdomAnimalia
- phylumChordata
- classAves
- orderAccipitriformes
- familyAccipitridae
- genusCircus
- SpeciesCircus spilothorax Salvadori & D'Albertis, 1875
Synonyms Circus approximans spilothorax, Circus spilanotus spilothorax, Circus spilonotus spilothorax
Other names and names in other languages (28)
- Papuan marsh-harrierEnglish
- مرزة بابوانArabic
- arpella de Nova GuineaCatalan
- moták papuánskýCzech
- Pletrygget RørhøgDanish
- PapuaweiheGerman
- papua cirkuoEsperanto
- Aguilucho lagunero papúSpanish
- Aguilucho lagunero de PapúaSpanish
- Paapua loorkullEstonian
- Busard de Nouvelle-GuinéeFrench
- Elang-rawa timurIndonesian
- Albanella della Nuova GuineaItalian
- パプアチュウヒJapanese
- Papuasinė lingėLithuanian
- PapoeakiekendiefDutch
- papuasivhaukNorwegian
- błotniak nowogwinejskiPolish
- tartaranhão-papuaPortuguese
- tartaranhão-da-papuaPortuguese
- Новогвинейский луньRussian
- kaňa papuánskaSlovak
- Papuanska eja močvaricaSerbian
- papuakärrhökSwedish
- Papua DelicesiTurkish
- лунь папуанськийUkrainian
- 巴布亚鹞Chinese
- 巴布亞鷂Chinese
Relatives of the papuan harrier
Other species in the same genus Circus.

Hen harrier
Circus cyaneus

Western marsh harrier
Circus aeruginosus

Pallid harrier
Circus macrourus

Montagu's harrier
Circus pygargus

Pied harrier
Circus melanoleucos

Swamp harrier
Circus approximans
ComparePapuan harrier vs Hen harrierPapuan harrier vs Western marsh harrierPapuan harrier vs Pallid harrierPapuan harrier vs Montagu's harrier
Common questions
Answered only where our data holds the answer.
How big is the papuan harrier?
An adult papuan harrier weighs 502.2 g – 622.2 g, according to values recorded on Wikidata.
Where does the papuan harrier live?
Catalogue of Life checklists list the papuan harrier for 1 country: Australia. Checklist coverage is uneven, so the true range may be wider.
Is the papuan harrier endangered?
The papuan harrier is listed as Least Concern on the IUCN Red List, meaning it is not currently at risk of extinction.
What kind of animal is the papuan harrier?
The papuan harrier (Circus spilothorax) belongs to the family Accipitridae in the order Accipitriformes.
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - AVONET: morphological, ecological and geographical data for all birds · CC BY 4.0 · v7
Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Papuan harrier (Circus spilothorax). Retrieved from https://creaturedata.com/animals/papuan-harrier
“Papuan harrier (Circus spilothorax).” CreatureData, 2026, https://creaturedata.com/animals/papuan-harrier.
@misc{papuan_harrier_2026,
title = {Papuan harrier (Circus spilothorax)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/papuan-harrier},
note = {Data as of 2026-11-11}
}