Ants in my pants! Wait, worse, on my ‘maters!

Have had some tomatoes attacked by ants. But what I am not sure of is, are the ants damaging the maters, or are the ants attracted to the damaged maters.

I am thinking maybe the latter, as I am seeing some with holes in them like in the second photo. Any ideas what is doing that?  Bird pecks?  Caterpillar?

Anyway, it is not affecting all of the tomatoes, just some of them, but would still be good to know what is going on out there.

I'm prepared to be wrong, but I don't think the ants are the source of your problem.  I think they're just opportunistic.

The holes look like wormhole-type insect damage to me, but I couldn't guess which critter is responsible.  The damage I get is splitting (due to irregular heavy rainfall) or chewing by climbing rodents, or sometimes piercing mouthpart damage from shield bugs.  

As Dan said, the ants are opportunistic and just happen to find the damage.

That looks like what they look like when birds find them.

I never see the birds, just the damage.

To solve the problem, we pick the tomatoes just as the tomatoes are turning yellow.  If we forget just one time ... it is too late.

I always have a brown paper sack sitting on my counter.  The tomatoes will ripen in the bag.

The bag ripened tomatoes are not as good as "vine" ripe but they taste a lot better than grocery store ones.