THE ILLUSTRATED LONDON NEWS NIGHTJARS NEED THE STARS By MAURICE BURTON, D.Sc. June 20. 1953 THE WORLD OF SCIENCE. &
... half-hour’s trilling. That evening another nightjar was heard trilling to the north. The sky was clear, although the night was chilly. The next night, with a clear sky, although still chilly, a third nightjar opened up to the south, much earlier, just after ...