Tracking Black Turnstones

PROJECT

Tracking Black Turnstones

Background


Black Turnstones, a stocky, black and white shorebird of the Pacific coast, spend summers along the coast of Alaska and winters from southeast Alaska to Mexico. Approximately 85% of the known global population nests in coastal meadows of the Yukon-Kuskokwim River Delta area, but little is known about their migratory behavior.  The number of turnstones stopping at Montague Island in Prince William Sound has declined dramatically in the last 15 years. This project aims to determine if the decline is due to an overall population decline or a shift in migratory stopover sites.

Methods

To track turnstone movements, researchers captured turnstones in March 2013 at Oak Harbor, WA, a non-breeding area and in June 2013 at Yukon Delta National Wildlife Refuge, AK, a breeding area. Each captured bird was given a unique combination of colored bands on its legs for individual identification.  In addition, some birds received a small device that records light levels periodically, from which latitude and longitude can be calculated. Turnstones typically return to the same breeding and wintering sites year after year, and we plan to recapture birds at the same sites in 2014. What we will learn

We will gain detailed information about the birds’ movements, including timing and locations of breeding and wintering activity, as well as stopover points critical to migration.  Specific questions we will answer are:

  • If Black Turnstones are not stopping at Montague Island, are they using other stopover sites in PWS, and if so, for how long?
  • Are there alternate stopover sites outside PWS (e.g. northern Aleutian Basin) that host large numbers of the species?
  • Is there evidence of a population decline on the breeding grounds in western Alaska that would explain the reduced numbers at Montague Island?
 

The answers to those questions will help to address priorities for state and national conservation plans, including the Alaska Comprehensive Wildlife Conservation Strategy and the U.S. Shorebird Conservation Plan.