| Summary: | <p>The breeding biology of the Storm Petrel Hydrobates pelagicus was
studied between July 1966 and September 1969 on Skokholm Island, Pembrokeshire. The Storm Petrel is a small pelagic sea-bird which comes to land
only during the breeding season, on Skokholm between late April and the
end of October. It is estimated that about 6,200 pairs breed on Skokholm,
and that the total community of birds visiting the colony numbers 17,000 -
19,000. The petrels nest in crevices amongst boulders or burrows underground, and visit the colony only by night.</p>
<p>[Abstract continued in thesis]</p>
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