Kakkak: Common on Guam

Yakkak (Yellow Bittern)Scientific Name: Isobrychus sinensis (Family ARDEIDAE)

Common Name: Yellow Bittern

Chamorro Name: Kakkak


Habitat and Natural History: Yellow bittern live in a variety of habitats including savanna, forest, offshore islands, tangantangan, weedy tall grass and moved fields. They feed on snails, geckos, insects, and fish. They are not strong fliers. They lay three to four eggs which are tended by both parents. Yellow bittern are shy, and usually solitary, although flocks of up to thirty individuals have been observed. On Guam the yellow bittern is considered a potential threat to airplane traffic near runways.

Description: This is the smallest bittern type bird. It is pale yellow with black on the wings. The coloring makes excellent camouflage.

Range: Kakkak are found throughout Micronesian on the islands of Palau; Yap, Guam; Commonwealth of the Northern Mariana Islands; Chuuk

Current Status: Common

Threats: Habitat loss, predation by the brown treesnake.

By Gretchen R. Grimm, MS