Guam Rail

Gallirallus owstoni (Rothschild, 1895)

226 gWeight

The Guam rail (Gallirallus owstoni), known locally and in Chamorro as ko'ko', is a small, terrestrial bird endemic to Guam in the Rallidae family.

Critically Endangered

Where and when it's recorded

No records at the public birding hotspots we track. It may be rare, remote, or its locations protected.

About

The Guam rail (Gallirallus owstoni), known locally and in Chamorro as ko'ko', is a small, terrestrial bird endemic to Guam in the Rallidae family. They are one of the island's few remaining endemic bird species. The species became extinct in the wild in the early 1980s when biologists captured the remaining wild population to establish a breeding program.

Excerpt from Wikipedia, CC BY-SA 4.0 · authors · Read more on Wikipedia

Questions

How big is the Guam Rail?

The Guam Rail weighs around 226 g.

Where does the Guam Rail live?

Its breeding range: Pacific Ocean: Guam (southern Mariana Islands, extinct in the wild); reintroduced Rota (southern Northern Mariana Islands, western Micronesia) and Cocos Island (south of Guam).

Is the Guam Rail endangered?

The IUCN Red List classifies the Guam Rail as Critically Endangered.

What does the Guam Rail eat?

Main food: Omnivore.

What family is the Guam Rail in?

It belongs to the family Rails, Crakes & Coots (Rallidae), order Gruiformes.

At a glance

Weight: 226 g
Habitat: Forest
Diet: Omnivore
Lifestyle: Active on the ground
Migration: Resident (barely migrates)
Conservation: Critically Endangered

More measurements

Wing: 112 mm
Tail: 49 mm
Bill: 39 mm
Tarsus: 43 mm

Averages from the AVONET dataset; length from field guides where available.

Range

Pacific Ocean: Guam (southern Mariana Islands, extinct in the wild); reintroduced Rota (southern Northern Mariana Islands, western Micronesia) and Cocos Island (south of Guam)

Breeding range, IOC World Bird List 15.2