Millerbird
Acrocephalus familiaris (Rothschild, 1892)
The millerbird (Acrocephalus familiaris) is a species in the family Acrocephalidae, order Passeriformes. Recorded adults weigh 18.3 g to 18.3 g and live up to 4.2 years. Its IUCN Red List status is Endangered.
Quick facts about the millerbird
- Weight
- 18.3 gsrc for Weight
- Length
- Not recorded
- Lifespan
- 4.2 yearssrc for Lifespan
- Diet
- Invertivoresrc for Diet
- Longest recorded lifespan
- 5 years
- Main food
- Not recorded
- Habitat
- shrublandsrc for Habitat
- Young per litter or clutch
- 2src for Young per litter or clutch
- Lifestyle
- Perchingsrc for Lifestyle
- Migration
- Sedentarysrc for Migration
- Conservation status
- Endangered (IUCN)src for Conservation status
- Countries on record
- Not recorded
Where does the millerbird live?
Not recorded
What is the millerbird?
The millerbird (Acrocephalus familiaris) is a species of Old World warbler in the family Acrocephalidae endemic to the Hawaiian Islands.
From the Wikipedia article “Millerbird” (en.wikipedia.org/w/index.php?title=Millerbird&oldid=1380696816), 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 millerbird endangered?
The millerbird is listed as Endangered on the IUCN Red List: it faces a very high risk of extinction in the wild.
- 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 Endangered species. What the categories mean.
How is the millerbird classified?
- kingdomAnimalia
- phylumChordata
- classAves
- orderPasseriformes
- familyAcrocephalidae
- genusAcrocephalus
- SpeciesAcrocephalus familiaris (Rothschild, 1892)
Synonyms Acrocephalus kingi kingi, Acrocphalus familiaris familiaris, Acrulocephalus familiaris, Tatare familiaris
Other names and names in other languages (36)
- Nihoa millerbirdEnglish
- Nihoa reed-warblerEnglish
- boscarla de l'illa NihoaCatalan
- rákosník laysanskýCzech
- HawaiisangerDanish
- LaysansangerDanish
- HawaiirohrsängerGerman
- Laysan-RohrsängerGerman
- LaysanrohrsängerGerman
- havaja kanbirdoEsperanto
- Carricero familiarSpanish
- havai roolindEstonian
- laysaninkerttunenFinnish
- Rousserolle obscureFrench
- havajski trstenjakCroatian
- Molnár-nádiposzátaHungarian
- Cannaiola delle HawaiiItalian
- レイサンヨシキリJapanese
- naminė nendrinukėLithuanian
- хавајски трскарMacedonian
- Kéyah Ałkééʼ Naaznilgo Dah Ndaaʼeełídę́ę́ʼ teełtah ayááshNavajo
- HawaiikarekietDutch
- nihoasangerNorwegian
- trzciniak cienkodziobyPolish
- felosa-familiarPortuguese
- felosa-havaianaPortuguese
- Гавайская камышовкаRussian
- Лайсанская камышевкаRussian
- Лайсанская камышовкаRussian
- trsteniarik tenkozobýSlovak
- hawaiisångareSwedish
- Millerbird KamışçınıTurkish
- очеретянка гавайськаUkrainian
- Chích cối xayVietnamese
- 米爾葦鶯Chinese
- 夏威夷苇莺Chinese
Relatives of the millerbird
Other species in the same genus Acrocephalus.
Great reed warbler
Acrocephalus arundinaceus
Common reed warbler
Acrocephalus scirpaceus
Sedge warbler
Acrocephalus schoenobaenus
Aquatic warbler
Acrocephalus paludicola
Marsh warbler
Acrocephalus palustris
Blyth's reed warbler
Acrocephalus dumetorum
CompareMillerbird vs Great reed warblerMillerbird vs Common reed warblerMillerbird vs Sedge warblerMillerbird vs Aquatic warbler
Common questions
Answered only where our data holds the answer.
How big is the millerbird?
An adult millerbird weighs 18.3 g, according to values recorded on Wikidata.
Is the millerbird endangered?
The millerbird is listed as Endangered on the IUCN Red List, meaning it faces a very high risk of extinction in the wild.
How long does the millerbird live?
The millerbird has a recorded lifespan of 4.2 years.
What kind of animal is the millerbird?
The millerbird (Acrocephalus familiaris) 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.
- 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 - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - 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). Millerbird (Acrocephalus familiaris). Retrieved from https://creaturedata.com/animals/millerbird
“Millerbird (Acrocephalus familiaris).” CreatureData, 2026, https://creaturedata.com/animals/millerbird.
@misc{millerbird_2026,
title = {Millerbird (Acrocephalus familiaris)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/millerbird},
note = {Data as of 2026-11-11}
}