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Satellite Tracking

Why did animal X stop transmitting?

Migratory Movements of Short-eared Owls (Asio flammeus)

A project of USFWS & ADFG in conjunction with the partners and sponsors detailed below.

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NameSpeciesLife StageRelease DateLast LocationDays Transmitted
737 Short-eared OwlAdult2010-07-122014-07-121461
738 Short-eared OwlAdult2010-07-132014-07-131461
740 Short-eared OwlAdult2010-07-132014-07-131461
741 Short-eared OwlAdult2010-07-132014-07-131461
742 Short-eared OwlAdult2010-07-142014-07-141461
743 Short-eared OwlAdult2010-07-152014-07-151461
744 Short-eared OwlAdult2010-07-152014-07-151461
745 Short-eared OwlAdult2010-07-152014-07-151461
746 Short-eared OwlAdult2010-07-162014-07-161461
747 Short-eared OwlAdult2010-07-162014-07-161461

Click on an animal's name for maps and more information.

Introduction

NOTE: To simplify tracking owls captured in 2010 near Fairbanks and Tok, AK, tracklines from the 2009 cohort were temporarily removed.

The Short-eared Owl is a widespread species that occurs nearly world-wide. The nominate race (A. f. flammeus) breeds across the arctic, boreal, and temperate zones of North America and winters across the temperate zone of the U.S. Notable characteristics of the species include their conspicuous nature (they are frequently seen hunting with distinct buoyant flight over open habitats, e.g., tundra, grasslands, pastures); they are one of few owls to nest on the ground; their diet consists mainly rodents and as a result populations are highly irruptive and nomadic.

Multiple sources suggest that the North American population of Short-eared Owl is undergoing range-wide declines, possibly as high as 71% over the past 40 years. Habitat loss and fragmentation are believed to be the primary factors linked to declines and extirpations in the contiguous U.S.

Populations breeding at northern latitudes are mostly migratory, but because of the scarcity of band recoveries, linkages between breeding and nonbreeding populations are poorly understood. This study is an effort to determine timing and routes used during migration, as well as the overwintering areas of Short-eared Owls captured in Alaska. Identifying these aspects of spatial and temporal connectivity will enable biologists to develop effective management and conservation strategies at a flyway scale.

We attached 12 g solar PTTs to 14 adults during June 2009 at Nome, Alaska. Three owls (93251, 93252, 93253) are females known to be nesting as of 26 June, 2009; the sex and breeding status of the remaining birds were not determined. During June and July 2010, we attached 12 g solar PTTs to an additional 12 adults captured near Fairbanks and Tok, Alaska.

This project is funded by Migratory Bird Management, U.S. Fish & Wildlife Service, Anchorage, AK and the Wildlife Diversity Program, Alaska Department of Fish and Game, Fairbanks, AK.

Project Partners

Jim Johnson, Migratory Bird Management, U.S. Fish and Wildlife Service, Anchorage, AK. email: jim_a_johnson@fws.gov

Travis Booms, Wildlife Diversity Program, Alaska Department of Fish and Game, Fairbanks, AK. email: travis.booms@alaska.gov

  • The presentation of data here does not constitute publication. All data remain copyright of the project partners. Maps or data on this website may not be used or referenced without explicit written consent.
  • If you have questions or would like to request the use of maps or data for this project please contact jim_a_johnson@fws.gov.

SEATURTLE.ORG collaborates with Argos to help scientists and conservationists manage and analyse their valuable animal tracking data.

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