The White-throated Ground Dove is a little known species from the Northern Mariana Islands of the Pacific Ocean. It occurs in all types of forested habitats on several islands in the Mariana Islands chain, and is most abundant on the island of Rota. This species is frugivorous, meaning it primarily eats fruits. Unlike other birds in the genus Gallicolumba, the White-throated Ground Dove forages in bushes and trees, and does not on the ground. Like other birds in the Mariana Islands, the White-throated Ground Dove is vulnerable due to the introduction of an invasive species, the brown tree snake. The White-throated Ground Dove was extirpated (meaning eliminated from a specific area, but not extinct) from Guam in 1986.

The Mariana Fruit-Dove is a beautiful bird from the Pacific islands. This species is found in various types of forested habitat, but prefers mature native forest where it typically feeds on fruits in the canopy, but may descend to feed in bushes, or even on the ground. They are a secretive species, rarely spotted, and nearly always solitary. The Mariana Fruit-dove has been extirpated (locally no longer present) from Guam and is threatened on Saipan by the introduced brown tree-snake.

In 2020, the National Aviary welcomed its first ever Mariana Fruit-Dove fledgling! The hatching of this beautiful little chick is an important step for securing a brighter future for Mariana Fruit-Doves.

Like the Golden White-eye, the Saipan White-eye, also known as the Bridled White-eye, is a small, understory specialist. Restricted to the island of Saipan in the Northern Mariana Islands, this species occurs in a wide variety of wooded and semi-wooded habitats, including native limestone forest, scrubby secondary growth of disturbed habitats, and even urban areas. The Saipan White-eye consumes a generalized diet of insects, including caterpillars, ants, and grasshoppers, as well as small snails, seeds, fruits, small berries, and nectar. Although still locally common, the introduction of the brown tree snake on Saipan has put this bird at extreme risk.

The National Aviary is a partner with the Marianas Avifauna Conservation (MAC) Project, which is working to save this and other species in the region from extinction. Although the population of this species still numbers in the hundreds of thousands, the introduction of the brown tree snake on Saipan puts this bird at extreme risk; consequently, it is considered endangered by the International Union for the Conservation of Nature (IUCN).

A small, understory specialist, the Golden White-eye is an Endangered bird restricted to the islands of Saipan and Aguijan in the Northern Mariana Islands. This species occurs in a wide variety of wooded and semi-wooded habitats, including suburban areas where it pursues a generalized diet of berries, seeds, nectar, and flower parts, as well as flying insects and other small invertebrates. Although still locally common, the introduction of the brown tree snake on Saipan has put this bird at extreme risk. The National Aviary is a partner with the Marianas Avifauna Conservation (MAC) Project, which is working to save this and other species in the region from extinction.

The Guam Kingfisher is small by kingfisher standards. Males average only about 58g (two ounces) and 24 cm (9 inches) long, making them less than half the size of North America’s Belted Kingfisher. Both male and female Guam Kingfishers have an iridescent blue-green back, a disproportionately very large, slightly crested, rust-colored head, and a long, stout, pointed bill. Males have cinnamon-colored underparts, while the underparts of females and juveniles are whitish.

After World War II, the accidental introduction of brown tree snakes (Boiga irregularis) to Guam resulted in the extinction of nearly all of the island’s dozen species of native land bird by the late 1970’s. Biologists realized that drastic action was needed if there was going to be any hope of saving what was left of Guam’s native birds. In 1984, when the Guam Kingfisher received “Endangered” status from the U.S. Fish and Wildlife Service, fewer than 50 were estimated to remain in the wild. Twenty-one of these were captured and transported to U.S. zoos; eight more birds were imported in 1986. The last sighting of a Guam Kingfisher in the wild was in 1988.

Encouragingly, the population of Guam Rails in human care has continued to grow. The world’s population of Guam Kingfishers, and the future of the species is in the hands of zoological institutions, including the National Aviary, which is proud to participate in and contribute to the Association of Zoos and Aquariums (AZA) Species Survival Plan (SSP) for the Guam Kingfisher.

The Guam Rail is a small, ground-dwelling bird, inhabiting forests, mixed woodland and scrub, fern thickets, and grasslands. They move quickly through thickets and grasses. It is most active at dawn and dusk.

In the late 1980s, the presence of an invasive species, the brown tree-snake threatened the survival of bird species on the island of Guam. The Guam Rail was nearly driven to extinction, but biologists managed to rescue the remaining rails and bring them into human care. The species was listed as Extinct in the Wild for over 30 years. Careful coordination between zoos helped this species survive and breed in human care. Gradually, the species was released on the islands of Rota and Cocos near Guam, where released birds themselves have since successfully reproduced! In 2019, the Guam Rail became only the second bird species ever to be upgraded from “Extinct in the Wild” to “Critically Endangered.”

The National Aviary played a vital role in the reintroduction of Guam Rails. More Guam Rails have hatched at the National Aviary than at any other North American zoo. Read more about the remarkable recovery of this Critically Endangered species!