LARGE AGGREGATIONS AND EVENING RAFTS OF POMARINE JAEGER Stercorarius pomarinus AT APOLLO BAY VICTORIA, AUSTRALIA
| Posted: |
12/04/2021 |
| Author(s): |
Andrew Isles, Christopher McInerny, Peter Menkhorst |
Observations during three summers of regular resting aggregations of Pomarine Jaegers Stercorarius pomarinus
on inshore waters of western Victoria are described. The aggregations occur in the evening during both calm and
rough conditions and sometimes during the afternoon during rough conditions. The numbers of birds involved (up
to 450 in January 2003 and 150 in January 2005) are an order of magnitude larger than any previously reported
group of Pomarine Jaegers in Bass Strait, and three to four times larger than the largest numbers previously
reported in Australian waters. Their regularity diurnal pattern and size, make these resting aggregations unlike
any previously reported behaviours of jaegers (genus Stercorarius).
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