When I netted the tannat I noticed more sunburn and bird damage than I expected.Weird harvest year. I got about half yield from the last 6 year average. Super small berries on my Aromella and lots of sunburn and raisining. Frontenac also had small berries and some significant bird damage. Delaware was the only variety that produced about as expected. Still have some Foche and Chambourcin and LaCrescent to harvest so we'll see how that goes.
This year I made an effort to keep the canopy a more open to reduce powdery mildew pressure and get more sun on the berries. I probably won't be as aggressive in thinning next year.
I wonder if that led to more bird damage. Previous years had denser canopy's with grapes not as visible from above. I also wonder if some other berry mostly failed this year so the robins are looking for a different food source. About 10 to 15 years ago the apricots froze. I didn't see a single apricot that year and that year was the only year our garden had bird, squirrel and rat damage. Without the apricots the animals had to replace a significant food source.
I was pretty happy when I didn't have to net and am naively hoping this years bird damage is a single year event.