Researchers Studied Emperor Geese Wintering Habits

A study of Kodiak and Shemya islands revealed how diet and habitat influence emperor goose survival rates.

Updated on Oct. 7, 2026 in Bird Watching

Gouache-painted illustration of two emperor geese on an Alaskan rocky shoreline, reflecting on conservation research. — Alaska Department of Fish and Game researchers studied emperor goose populations on Kodiak and Shemya islands to address long-term decline. AI Illustration. Upload story photo >

Live Poll

Should conservation efforts prioritize protecting specific local habitats for bird populations?

Researchers analyzed the wintering habits of Alaska emperor geese between 2023 and 2026 to address long-term population declines. The study highlighted significant demographic and dietary differences between geese populations on Kodiak Island and Shemya Island.

Why it matters

Understanding why emperor goose populations shifted from 140,000 in the 1960s to 42,000 in the 1980s is vital for effective conservation. The findings help explain why hunting was restricted in 2017 and provide data for future population management.

Kodiak Island featured a ratio of one juvenile per three adult geese, whereas Shemya Island showed a much lower ratio of one juvenile per 16 adults. Geese on Kodiak prioritized barnacles and mussels, while Shemya geese consumed grasses and seaweeds.

The players

Alaska Department of Fish and Game

This state agency is responsible for managing Alaska's fish and wildlife resources through research, regulation, and habitat protection.

The details

The Alaska Department of Fish and Game analyzed bird blood samples to track diet and survey demographics over three winters. Findings suggest geese on Shemya eat lower on the food web than their counterparts on Kodiak, potentially impacting their overall health and development.

1960s: Emperor goose populations reached approximately 140,000.
1980s: The population declined significantly to 42,000.
2017: Subsistence and sport hunting were closed.
2019: Alaska Department of Fish and Game began consistent data collection.
Upcoming winter: Researchers will survey eight additional sites, including Unalaska and Cold Bay.

Culture Shift

This research follows the precedent set by the 2017 emperor goose hunting closure, providing the biological justification for continued regulation of the species. It reflects a broader shift toward data-driven conservation as wildlife managers seek to restore populations to historic levels.

Residents in the Aleutian Chain and Alaska Peninsula should be aware that researchers will be conducting field surveys at locations including Unalaska, Nikolski, and Atka this coming winter. These efforts are part of ongoing initiatives to monitor the health and population of emperor geese.

The takeaway

Emperor geese demonstrate high site fidelity by returning to the same wintering areas year after year, which makes local habitat health critical for population stability. Conservation efforts rely on understanding these distinct dietary and survival patterns to effectively manage Alaskan wildlife.