Skip to main content
U.S. flag

An official website of the United States government

Scientist holding Olive-sided Flycatcher

Detailed Description

Scientist holding Olive-sided Flycatcher, Anchorage, AK. Their global population has declined by 78% since 1970. A study, led by the Alaska Department of Fish and Game's Threatened, Endangered, and Diversity Program, tracked for the first time this species' migration from its boreal forest breeding areas in Alaska to Neotropical wintering areas in northwestern South America and back again. Birds migrated 23,555-km (14,636 miles) each year, one of the longest documented songbird migrations. The paper was published in Animal Migration as part of a special collection entitled "Arctic Migrations in a Changing World" and is available at: . Copyright: Photo taken by Julie Hagelin, Alaska Department of Fish and Game. 


To be used for USGS social media and USGS web outreach only. For online releases, website address: USGS Multimedia Gallery ( and