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1) This document discusses optimal protocols for surveying the Eurasian bittern population through male vocalization counts. It finds booming activity peaks in the morning and evening and decreases in poor weather. 2) Acoustic triangulation is tested as a method for locating individual bitterns. Factors like wind speed and distance that influence bearing accuracy are identified. 3) With optimal conditions, bitterns can be located within a 40m radius using multiple directional bearings from the reedbed edg

Author

Dorin Damoc

Language

EN