1) get a BB gun :)
2) Bury the bird mesh under the ground so there's no entry point. Use zippers or whatever you can for an open/close point to access the tomatoes.

Just my ideas

Some birds will find their way into the bird netting. Most will be deterred. At least, that has been my experience. I found a little bird (vireo?) caught up in the netting but was able to release him.

Netting is a good way to go for small tree, but it's tough to wrap around a big tree. I still haven't tried "scare tape", and response to my queries have yielded mixed results. In sum, it seems to work while it works, but the birds seem to catch on.

RB

Maybe installing a bird bath or other source of water would keep the birds out of your tomatoes? I've heard on this forum that birds are usually just looking for water when they peck into tomatoes.