Bittern apparently feeding at night by artificial light

At 23.30 GMT on 23rd January 1976, while walking along a canal at Kingsmead, Ware, Hertfordshire, I noticed something moving under a sodium lamp a little ahead of me. On further investigation, I discovered a Bittern Botaurus stellaris standing in 8-10 cm of water, app arently fishing by the yellow light of the lamp. Unfortunately, it flew


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