CreatureData

Mariana crow

Corvus kubaryi Reichenow, 1885

CRCritically Endangeredsongbirds

The mariana crow (Corvus kubaryi) is a species in the family Corvidae, order Passeriformes. Recorded adults weigh 238.2 g to 253.2 g. Its IUCN Red List status is Critically Endangered.

Mariana crow (Corvus kubaryi)
Photo: United States Geological Survey Fort Collins Science Center · Public domain · Wikimedia Commons

Quick facts about the mariana crow

Weight
238.2 g – 253.2 gsrc for Weight
Length
Not recorded
Lifespan
Not recorded
Diet
Omnivoresrc for Diet
Main food
Not recorded
Habitat
forestsrc for Habitat
Young per litter or clutch
2 – 3src for Young per litter or clutch
Lifestyle
Perchingsrc for Lifestyle
Migration
Sedentarysrc for Migration
Conservation status
Critically Endangered (IUCN)src for Conservation status
Countries on record
Not recorded

Where does the mariana crow live?

Not recorded

What is the mariana crow?

Quoted from WikipediaCC BY-SA 4.0

The Mariana crow (Corvus kubaryi) (Chamorro: åga) is a species of the crow family from the tropical Western Pacific. It is a glossy black bird about 15 inches (38 cm) long and known only from the islands of Guam and Rota.

It is a rare bird which has steadily declined in numbers since the 1960s. On Guam there are no remaining native Mariana crows, the population having been wiped out by the introduction of the brown tree snake. On Rota the population has declined to fewer than 200 individuals, the main threats here being the reduction of suitable habitat because of development and predation. Despite translocations from Rota to the Guam National Wildlife Refuge in the late 1990s and early 2000s, by 2011 the Mariana Crow was extirpated from Guam. Current conservation efforts on Rota include habitat protection, and a captive rear-and-release program. The International Union for Conservation of Nature has rated the bird as being "critically endangered".

From the Wikipedia article “Mariana crow” (en.wikipedia.org/w/index.php?title=Mariana_crow&oldid=1380595333), 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 mariana crow endangered?

The mariana crow is listed as Critically Endangered on the IUCN Red List: it faces an extremely high risk of extinction in the wild.

  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 Critically Endangered species.

How is the mariana crow classified?

  1. kingdomAnimalia
  2. phylumChordata
  3. classAves
  4. orderPasseriformes
  5. familyCorvidae
  6. genusCorvus
  7. SpeciesCorvus kubaryi Reichenow, 1885
Other names and names in other languages (40)
  • Guam crowEnglish
  • Guam crowEnglish
  • غراب مارياناArabic
  • cornella de les illes MarianesCatalan
  • AgaChamorro
  • ÅgaChamorro
  • vrána guamskáCzech
  • brân y MarianasWelsh
  • MarianerkrageDanish
  • GuamkräheGerman
  • Guam-KräheGerman
  • mariana korvoEsperanto
  • Cuervo de las MarianasSpanish
  • mariaani varesEstonian
  • mariaanienvarisFinnish
  • Marianas CrowFrench
  • Corneille de GuamFrench
  • marijanska vranaCroatian
  • guami varjúHungarian
  • Corvo delle MarianneItalian
  • Cornacchia delle MarianneItalian
  • クバリーガラスJapanese
  • 마리아나까마귀Korean
  • guaminė varnaLithuanian
  • MarianenkraaiDutch
  • guamkråkeNorwegian
  • wrona mariańskaPolish
  • gralha-de-rotaPortuguese
  • gralha-das-marianasPortuguese
  • Гуамский воронRussian
  • Гуамская воронаRussian
  • vrana mariánskaSlovak
  • Vrana sa ostrva Guam i RotaSerbian
  • guamkråkaSwedish
  • MarianerkråkaSwedish
  • Mariana Adaları KargasıTurkish
  • ворона гуамськаUkrainian
  • 關島鴉Chinese
  • 关岛乌鸦Chinese
  • 關島烏鴉Chinese

Catalogue of LifeWikipediaiNaturalistWikidataIUCN Red List

Relatives of the mariana crow

Other species in the same genus Corvus.

LC, Least Concern
Rook (Corvus frugilegus)

Rook

Corvus frugilegus

Corvidae

LC, Least Concern
House crow (Corvus splendens)

House crow

Corvus splendens

Corvidae

LC, Least Concern
Pied crow (Corvus albus)

Pied crow

Corvus albus

Corvidae

CompareMariana crow vs Common ravenMariana crow vs RookMariana crow vs Hooded crowMariana crow vs Carrion crow

Common questions

Answered only where our data holds the answer.

How big is the mariana crow?

An adult mariana crow weighs 238.2 g – 253.2 g, according to values recorded on Wikidata.

Is the mariana crow endangered?

The mariana crow is listed as Critically Endangered on the IUCN Red List, meaning it faces an extremely high risk of extinction in the wild.

What kind of animal is the mariana crow?

The mariana crow (Corvus kubaryi) belongs to the family Corvidae 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). Mariana crow (Corvus kubaryi). Retrieved from https://creaturedata.com/animals/mariana-crow

MLA

“Mariana crow (Corvus kubaryi).” CreatureData, 2026, https://creaturedata.com/animals/mariana-crow.

BibTeX
@misc{mariana_crow_2026,
  title = {Mariana crow (Corvus kubaryi)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/mariana-crow},
  note = {Data as of 2026-11-11}
}