Green Heron in Cornwall in 1889

01 October 1972
Comments Main paper Until the early i95o's, leading British and Irish ornithologists were notoriously reluctant to admit the possibility of natural transatlantic crossings by landbirds. This was the attitude of Howard Saunders, one of the most influential ornithologists of t...
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The height of bird migration

01 January 1960
Comments Main paper M I G R A T I N G B I R D S cannot be seen when they are high above the ground by day, even with military optical equipment (Sutter 1950), and means have not yet been found for accurately assessing the height of night-migrants seen by telescope against th...
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