Blackbirds for sure. You have to be very careful with netting and leave no gaps. It's light very, very early in the morning; they have hours in which to prospect the gaps in your defences.
We bought ours from our greengrocer. Ask, he may know someone. Also look at the small ads in your local paper. Or look in Yellow Pages.
Time flies and she will be off to college or round the world in no time. You'll miss her!
Just because they are on sale in April it doesn't mean it is the ideal time. I concur with Dave.
Why would you want to do that?
If you are determined, let the seeds mature and the foliage die down then separate the seeds out and make sure they are fully dry (or they will go mouldy) before you store them.
And plant them much earlier next year.
For Heaven's Sake!! It is all part of Nature. Do you only want the fluffy bunny Nature?
Black spot is a consequence of clean air. It used to be kept in check by the sulphur pollution.
Sulphur spray is therefore the best cure. Is it obtainable?
Throw it out now. If you have neighbours they will not be happy to have that inflicted on them.