Bugs or Birds?

[kwselke]

I've never quite seen damage like this to a tomato fruit and need help figuring out if it was done by a bird or a worm of some type. I have never seen a bird do such clean holes or worms penetrate that deep into a fruit. Should I dust with BT or guard with BBs? Well right now I'm out of BT, but I do have Spinosad on hand. The fruit is a golf ball size Bush Early Girl. Thanks!