Leach's Petrels in Shetland.--On 6th August 1957, Leach's Petrels (Oceanodroma leucorrhoa) were located over the boulderstrewn slopes of The Noup, Foula, Shetland. One was caught and at the same time two others could be heard calling- in flight. One was again calling on the 7th, but on the 9th only the first half of a single call was heard. T h e moon was then full and with petrel activity at a mini...

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