01 September 1959
Petrels (Oceanodroma leucorrhoa) have been known to breed on the Flannan Isles, some 20 miles west of Lewis in the Outer Hebrides, since 1904 ( W . Eagle Clarke, Annals Scot. Nat. Hist., 1905, pp. 8-19 and 80-86). However, apart from the discovery of colo...