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Black-vented Shearwaters

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  • Kevin Larson
    Greetings, 30 May 2004 This morning there was a good movement of tubenoses at Pt. Vicente in Rancho Palos Verdes, Los Angeles County. All birds were
    Message 1 of 1 , May 30, 2004
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      Greetings,

      30 May 2004

      This morning there was a good movement of tubenoses at Pt. Vicente in
      Rancho Palos Verdes, Los Angeles County. All birds were northbound.

      0615-0745:
      Northern Fulmar - 7
      Pink-footed Shearwater - 25
      Sooty Shearwater - 1097
      Black-vented Shearwater - 58

      Fifty-eight northbound Black-vented Shearwaters on 30 May is very
      strange. Normally BVSH numbers dwindle to a few by late April or early
      May, and none are seen again until the period of July-early September.

      My recent BVSH counts at Pt. Vicente are (visits are usually 1-3 hrs. in
      the morning):

      27 Mar - ~500
      11 Apr - 3
      15 Apr - 0
      17 Apr - 1
      18 Apr - 3
      01 May - 1
      08 May - 0
      09 May - 1
      15 May - 1
      23 May - 12 all northbound
      30 May - 58 all northbound

      This late May trend of increasing numbers of northbound BVSH is
      intriguing. Granted, it is always difficult to determine if a BVSH
      movement is only local or trending over a greater distance. More data
      will be helpful when beginning to speculate whether these birds could
      returning very early to this area from their nesting areas. It will be
      interesting to see what happens over the next month.

      Kevin Larson
      Lawndale
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