Notes

01 December 1976 Comments Notes Diving rates of Great Northern Diver An adult Great Northern Diver Gavia immer was present at Chew Valley Lake, Avon, in November 1974, when the following observations, mainly concerning the bird's diving behaviour, were made. Preliminary obser...
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Notes

01 November 1976 Comments Notes Trembling movements of House Martin when nest-building On 6th June 1975, near South Gorley, Hampshire, I watched at close range with binoculars a House Martin Delichon urbica building its nest, which was in the early stages of construction. The...
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