Thanks for all the suggestions.
I appreciate damaged fruit serves other purposes then our food, but they are wasters of our food. We're not growing fruit for
compost and attracting wasps so to speak ... We'd like some fruit as well. It's not like leaving 1/3 to the birds, it's more like leave 1/10 for us humans only because were were quick
enough to pick, otherwise there would be none for us.
Permaculture doesn't mean feed one bird species, we'd like to eat some as well, and see a diversity of birds.
It is the fruit that attracts them, and makes them mad.
Family has a property closeby, with much more
land and with no fruit trees. A kind of
permaculture design without fruit. They are more into trees, animals, veggies,
mushrooms. There are plenty of bird species, not one blackbird have I ever seen there on visits.
If the blackbirds in our garden would also go after the snails, and leave the other birds a flourishing place in the garden, we'd consider them part of the
permaculture environment, forget all the fruit they damage and only focus on the veggies. They have however created a "monoculture" bird environment, and snails are flourishing. One could argue it's because we need to make more food available to them, but, the garden has its boundaries, and said snails are supposedly part of their diet.
10 years ago there was 1 couple of blackbirds, and plenty of other birds. There were some snails, but not the amount there are today - today we've resorted to parasitic nematodes since no wildlife manages the snails. The garden was not a
permaculture design, there was plenty of wilderness, only a few
apple trees who all delivered their fruit at the same time. There was the occasional bird damaged
apple, but 95% did not go to birds. Quite a bit of surplus fell on the ground and/or was left on the tree for the winter.
In came the fruit bushes and trees, who produce fruit at various times, so there is varying fruit throughout the season. Today there are 5 couples of blackbirds, all with their nest and young to feed. I think that's where the imbalance comes from: they can raise them with plenty of food during the season of plenty as long as they chase all the others away. They are more clever I guess, or maybe they are more like us humans, chase the others so we have more?
Solutions:
You're right, listening to movement triggered noise blasts will only aggress us, and them blackbirds I am sure will be comfortable with the noise in no time.
We never tried mulburry, need to look into that though I suspect it would only work part of the season and allow for more blackbird families to feed themselves and thrive?
How does one transform a cat into a hunter of blackbirds? They are clever at surviving. I wouldn't want a hunter cat to chase the other birds I want to lure back into the garden because they are more easy and end up leaving the blackbirds alone, like the one we have now.
The hanging of a live version we tried. Very unfriendly way, and only effective in a narrow stretch (2-3 meter) around the place where the live bird is strung to a pole.
I've been tinkering about installing bird nests with an entry diameter too small for blackbirds to enter. I'm thinking, if other bird species have an easy and safe nest which blackbirds do not get access to, they may be more willing to put up a fight with blackbirds for territory? Which diameter is just small enough for blackbirds to not be able to take up residence? Anyone got
experience?
We'd like to find a permaculture way to reduce the blackbirds, and reestablish other bird species. If the only way is to catch and dispose of them until the next lot comes along and fights for the bountyful garden territory, we'll do, but there must be more permaculture ways to reduce the blackbird's overweight and let other birds come back and a have bit more fruit for us?