CreatureData

Nauru reed warbler

Acrocephalus rehsei (Finsch, 1883)

NTNear Threatenedsongbirds

The nauru reed warbler (Acrocephalus rehsei) is a species in the family Acrocephalidae, order Passeriformes. Recorded adults weigh 32.2 g to 36.5 g. Its IUCN Red List status is Near Threatened.

Nauru reed warbler (Acrocephalus rehsei)
Photo: Hephaestion · CC BY 4.0 · Wikimedia Commons

Quick facts about the nauru reed warbler

Weight
32.2 g – 36.5 gsrc for Weight
Length
Not recorded
Lifespan
Not recorded
Diet
Invertivoresrc for Diet
Main food
Not recorded
Habitat
forestsrc for Habitat
Young per litter or clutch
Not recorded
Lifestyle
Perchingsrc for Lifestyle
Migration
Sedentarysrc for Migration
Conservation status
Near Threatened (IUCN)src for Conservation status
Countries on record
Not recorded

Where does the nauru reed warbler live?

Not recorded

What is the nauru reed warbler?

Quoted from WikipediaCC BY-SA 4.0

The Nauru reed warbler (Nauruan: itsirir) (Acrocephalus rehsei) is a passerine bird endemic to the island of Nauru in the Pacific Ocean. It is one of only two native breeding land-birds on Nauru and it is the only passerine found on the island. It is related to other Micronesian reed warblers, all of which evolved from one of several radiations of the genus across the Pacific. Related warblers on nearby islands include the Caroline reed warbler, with which the Nauru species was initially confused, and the nightingale reed warbler, which was formerly sometimes considered the same species.

A medium-sized warbler, the Nauru reed warbler has dark brown upperparts, cream underparts and a long, thin beak. It makes a low, cup-shaped nest into which it lays two or three white eggs, and it feeds on insects. However, details about its behavior and ecology are little known. It is found throughout Nauru, which has changed substantially in recent decades due to phosphate mining. The Nauru reed warbler is potentially threatened by introduced predators and habitat loss, and its small range means that it could be vulnerable to chance occurrences, such as tropical cyclones. Reports of a similar warbler from nearby islands suggest that it might previously have been found elsewhere, but was driven to local extinction by introduced cats.

From the Wikipedia article “Nauru reed warbler” (en.wikipedia.org/w/index.php?title=Nauru_reed_warbler&oldid=1339431474), 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 nauru reed warbler endangered?

The nauru reed warbler is listed as Near Threatened on the IUCN Red List: it is close to qualifying as threatened.

  1. LCLeast Concern
  2. NTNear Threatened
  3. VUVulnerable
  4. ENEndangered
  5. CRCritically Endangered
  6. EWExtinct in the Wild
  7. EXExtinct

Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Near Threatened species. What the categories mean.

How is the nauru reed warbler classified?

  1. kingdomAnimalia
  2. phylumChordata
  3. classAves
  4. orderPasseriformes
  5. familyAcrocephalidae
  6. genusAcrocephalus
  7. SpeciesAcrocephalus rehsei (Finsch, 1883)

Synonyms Acrocephalus luscinia rehsei, Calamoherpe rehsei

Other names and names in other languages (41)
  • Finsch's reed-warblerEnglish
  • Finsch's reed-warblerEnglish
  • Nauru reed-warblerEnglish
  • Nauru reed-warblerEnglish
  • Nauru reed-warblerEnglish
  • Boscarla de NauruCatalan
  • boscarla de l'illa NauruCatalan
  • rákosník nauruskýCzech
  • Telor cyrs NauruWelsh
  • NaururørsangerDanish
  • NaururohrsängerGerman
  • Nauru-RohrsängerGerman
  • naura kanbirdoEsperanto
  • Carricero de NauruSpanish
  • Carricero de NaurúSpanish
  • nauru roolindEstonian
  • naurunkerttunenFinnish
  • naurusaarenkerttunenFinnish
  • Rousserolle de NauruFrench
  • oblokrili trstenjakCroatian
  • naurui nádiposzátaHungarian
  • Cannaiola di NauruItalian
  • ギルバートヨシキリJapanese
  • giruba-toyoshikiriJapanese
  • naūrinė nendrinukėLithuanian
  • науруански трскарMacedonian
  • itsirirNauru
  • NaurukarekietDutch
  • NaurusongarNorwegian Nynorsk
  • naurusangerNorwegian
  • trzciniak samotnyPolish
  • felosa-de-nauruPortuguese
  • Наурская камышовкаRussian
  • Науруанская камышевкаRussian
  • Науруанская камышовкаRussian
  • trsteniarik nauruskýSlovak
  • naurusångareSwedish
  • Nauru KamışçınıTurkish
  • очеретянка науруйськаUkrainian
  • 瑙鲁苇莺Chinese
  • 諾魯葦鶯Chinese

Catalogue of LifeWikipediaiNaturalistWikidataIUCN Red List

Relatives of the nauru reed warbler

Other species in the same genus Acrocephalus.

LC, Least Concern
Sedge warbler (Acrocephalus schoenobaenus)

Sedge warbler

Acrocephalus schoenobaenus

Acrocephalidae

LC, Least Concern
Marsh warbler (Acrocephalus palustris)

Marsh warbler

Acrocephalus palustris

Acrocephalidae

CompareNauru reed warbler vs Great reed warblerNauru reed warbler vs Common reed warblerNauru reed warbler vs Sedge warblerNauru reed warbler vs Aquatic warbler

Common questions

Answered only where our data holds the answer.

How big is the nauru reed warbler?

An adult nauru reed warbler weighs 32.2 g – 36.5 g, according to values recorded on Wikidata.

Is the nauru reed warbler endangered?

The nauru reed warbler is listed as Near Threatened on the IUCN Red List, meaning it is close to qualifying as threatened.

What kind of animal is the nauru reed warbler?

The nauru reed warbler (Acrocephalus rehsei) belongs to the family Acrocephalidae in the order Passeriformes.

Sources and how to cite this page

Data as of 2026-11-11. How this page is put together.

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APA

CreatureData. (2026). Nauru reed warbler (Acrocephalus rehsei). Retrieved from https://creaturedata.com/animals/nauru-reed-warbler

MLA

“Nauru reed warbler (Acrocephalus rehsei).” CreatureData, 2026, https://creaturedata.com/animals/nauru-reed-warbler.

BibTeX
@misc{nauru_reed_warbler_2026,
  title = {Nauru reed warbler (Acrocephalus rehsei)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/nauru-reed-warbler},
  note = {Data as of 2026-11-11}
}