Head to head
Guam Rail vs Okinawa Rail
The Guam rail and Okinawa rail are both flightless rails native to Pacific islands, and both have been pushed toward extinction by introduced predators, but their stories have unfolded very differently.
| Guam Rail | Okinawa Rail | |
|---|---|---|
| Scientific name | Hypotaenidia owstoni | Hypotaenidia okinawae |
| Native range | Guam | Northern Okinawa (Yanbaru forest) |
| Main threat | Invasive brown tree snakes | Introduced mongooses, feral cats |
| Population history | Extinct in the wild, since reintroduced | Never extinct, but declining |
| Scientific discovery | Long known to science | Not described until 1981 |
| Conservation status | Critically Endangered | Endangered |
| Population trend | Increasing | Decreasing |
| Habitat | Forest | Forest |
Guam Rail vs Okinawa Rail: common questions
Which rail was discovered more recently, the Guam rail or the Okinawa rail?
The Okinawa rail was discovered far more recently, remaining entirely unknown to science until 1981, while the Guam rail had long been documented before invasive brown tree snakes drove it to extinction in the wild during the 1980s.
Why is the Guam rail increasing while the Okinawa rail is still decreasing?
The Guam rail's increase follows intensive captive breeding and reintroduction to sites specifically managed to exclude brown tree snakes, while the Okinawa rail's wild population continues to face ongoing pressure from introduced mongooses and feral cats within its forest habitat.
Can either the Guam rail or the Okinawa rail fly?
No, both species are completely flightless, a trait that made them especially vulnerable once mammalian predators were introduced to their respective islands, since neither could escape by taking to the air.