Strange. Heard repetitive tapping sound while on the boat this week. The source was a woodpecker attacking the furled genoa on a neighboring boat. Must have been bugs in the sail. Link to picture:
https://drive.google.com/file/d/1kc4okG4zrUi3Vh4GgUM4wJZAQE4fGFNt/view?usp=sharing -- Dennis C. Touche' 35-1 #83 Mandeville, LA