Shearwater Research

Despite major losses in nesting habitat throughout Hawaiʻi, Wedge-tailed Shearwaters (ʻUaʻu kani) are increasing following conservation efforts to control introduced predators and to restore native vegetation at breeding sites. At the Freeman Seabird Preserve, the collaborative research program that began in 2009 has documented that this unique urban colony has quadrupled in size, from less than 200 breeding birds to over 800 breeding birds (Hyrenbach & Hester 2022).

FSP Trend 2009 2022

Caption: Yearly colony census during the peak chick incubation period show a long-term increase in the number of nests at the Freeman Seabird Preserve. On average, the colony grows by 24.9 nests (+/- 5.3 S.D.) each year.

Since 2009, researchers studying the shearwaters at the Freeman Seabird Preserve have learned about their lives at the colony and in the ocean. Explore what we have learned in the tabs below.

Learn the
Way of the Wedgie