a visit to North Rona, Scotland, on 3rd June 1958, I found a Fulmar (Fulmarus glacialis) incubating three eggs of the Great Black-backed Gull (Larus marinus). T h e nest was that of the gull and was built among rocks on comparatively flat ground on the Fianuis promontary. The Fulmar was flushed and was back on the e g g s within five minutes, during which time I had moved only 10 to 15 yards away....

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