BCF, Cromwell, April 1965
Page 97
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Transcription
feed by hovering, diving from heights in excess of 30 ft, and flying off from the surface of the water. Several times birds were seen for the first time rising from the water as if they had been sitting on it, but no bird was actually observed sitting on the water. Common Noddy Of the 420 Noddies seen in April, 22 were seen on three separate days in excess of 50 miles from land. One flock of five was found at 15° N, over 200 miles from nearest land. Observation of Noddies this far from land, while not unprecedented, is nevertheless unusual. Sooty Tern Numbers decreased 22 o/o from March's total of 2133 to 1655 in April. Greatest concentrations occurred around the high Hawaiian Islands and along the 154° W leg south to 10° N. The difference between April's and March's totals was due largely to the relative lack of birds (97) seen north of Oahu this month. Such a concentration was evident in April 1964 (750 birds). A shift to more southerly feeding grounds on the part of Sooties this April would explain this inconsistency. Fairy Tern Numbers remained constant from March to April, 24 this month and 23 last month. The complete absence of this species from the area in April 1964 is puzzling in light of the numbers seen in 1965. Two-thirds of the birds seen this month were within 100 miles of the high Hawaiian Islands. Blue-grey Noddy At least one and possibly two more Blue-grey Noddies were seen shortly after leaving Port Allen, Kauai. This is the first sighting of this species on a Cromwell cruise, even though the birds were seen in an area previously unsampled by the ship.