Westward range extension of Short-tailed Shearwaters Ardenna tenuirostris in the Southern Ocean

Short Note

Abstract

Short-tailed Shearwaters Ardenna tenuirostris are transequatorial migrants that breed at islands in southern Australia and spend the austral winter in the North Pacific. Adults feeding chicks undertake long foraging trips into Antarctic waters (to 70°S) across a broad longitudinal range (mainly 55–180°E). In mid-March 2017, we observed thousands of shearwaters in the vicinity of Bouvetøya (from 55°S 0°E to 50°S 8°E). These observations occurred more than 2000 km west of the documented range of this species, and raise the possibility that some Short-tailed Shearwaters migrate to the North Atlantic Ocean. Further observations are needed to determine whether this is a regular behaviour that has been overlooked in the past due to confusion with Sooty Shearwaters A. grisea, or whether 2017 was an unusual year for Short-tailed Shearwaters.

Keywords

Ardenna tenuirostris Atlantic Ocean Bouvetøya Migration 

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Peter G. Ryan
    • 1
  • Fabrice Le Bouard
    • 2
  • Jasmine Lee
    • 3
  1. 1.FitzPatrick Institute of Africa OrnithologyUniversity of Cape TownRondeboschSouth Africa
  2. 2.Centre d’Etude Biologiques de Chize, CNRSVilliers En BoisFrance
  3. 3.Centre for Biodiversity Conservation ScienceUniversity of QueenslandSt LuciaAustralia

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