A Collaborative Effort involving AZA, CNMI DFW, USFW,

The Commonwealth of the Northern Mariana Islands (CNMI) has had a long and volatile history. Islands that were relied upon heavily in WWII as launching sites for the two atomic bombs, are now battling for survival against a different enemy. This adversary threatens the survival of many bird species that exist exclusively on these islands.

Brown Tree Snake

Since 1952, CNMI has been invaded by the Brown Tree Snake, Boiga irregularis, which has had devastating effects on bird populations on the island of Guam. Ten of the island’s twelve forest bird species are extinct, and the two surviving species are found only in tiny localized populations. Sightings of the snake have been increasing on the islands of Rota, Saipan, and Tinian. In 2004, the CNMI wildlife department asked North American zoos for assistance in developing captive populations of native bird species to be used as source populations if the brown tree snake should further decimate the native avifauna. This endeavor was named the Mariana Avifauna Conservation (MAC) Program. For several years, species have been collected and transferred to U.S. zoos, while other birds have been translocated to smaller snake-free isles.

Bridled White-Eye Removal

The Toledo Zoo has contributed to the MAC Program in house as well as in the field. Since 2009, keepers from the bird department have been afforded the opportunity to work alongside other staff from U.S. zoos to capture, translocate, and transfer at risk avian species. Several of these Mariana species are currently being worked with at the Toledo Zoo. In the Aviary,  you can see a pair of both the White-Throated Ground Doves and the Golden White-Eyes, while our off exhibit Avian Breeding Center cares for a pair of Mariana Fruit Doves and nine Bridled White-Eyes. Our White-throated Ground Doves have reared three chicks, and both the Bridled and Golden White-Eyes have produced offspring.  Unfortunately we have not yet fledged a white-eye, but so little is known about these species that every bit of information learned will help future endeavors here as well as elsewhere in the zoo community. Though our Mariana Fruit Dove pair has produced eggs, they have not yet settled on a nest in which to incubate them (as is fairly typical of young fruit doves)

White-Throated Ground Dove
White-Throated Ground Dove

Golden White-eye
Golden White-eye

Bridled White-eye
Bridled White-eye

Mariana Fruit Dove
Mariana Fruit Dove

The invasion of the Mariana Islands by the brown tree snake is a classic example of how devastating a non-native species can be to an environment ill-equipped to defend against it. Through ongoing research by the MAC Program and the collaborative efforts of hard-working individuals, there is hope for the birds of the Marianas Islands. It is because of generous contributions to the Conservation Today program that the Toledo Zoo can continue aiding the program and saving these species.

Click here for a detailed report about the MAC program in PDF format

Visit the MAC Facebook page

The You Tube video below shows footage of some of the birds studied in their natural habitat during a MAC trip.
Video was recorded and provided by Mike Macek of the St. Louis Zoo