ML186877

הערות

Sennheiser ME 67 shotgun microphone mounted on tripod. Clear sky, no clouds. 5 miles per hour wind. Chimney Swifts entering very tall chimney to roost for night. Top of chimney is 200 feet above ground. Microphone is mounted on tripod standing on ground. 450 chimney swifts enter chimney over 34 minute recording time. First swifts for evening enter chimney at start of recording. Almost all swifts have entered chimney be end of 34 minute recording. chimney swifts enter chimney over 34 minute recording time.