I have trouble with Cardinals,turkeys and quail stripping the peas from their shell
Cardinals are the main culprit when they are still green
Charlie

"The plants look perfect except for the peas being eaten from the pod, with some shriveling."

Do you mean that the pods have been opened, and the seeds removed? Was the pod chewed open?

Voles are a frequent culprit here, they will harvest the seeds of legumes as they begin to ripen. For the most part, they prefer to harvest seeds close to the ground, often pulling plants down; but they can climb as well. Last year they climbed the trellis to harvest seeds from my yardlongs... they must have been hanging from the pods as they did so. I put a few rat traps out, which put an end to their pilfering.

I definitely have voles in my yard--and I have seen a chipmunk a couple times. argh!
They are just doing it so cleanly--bean removed, pod left hanging intact, that I could not determine the culprit, and I wondered if the wasps were after something I could not see.
There is no point in trapping--they have so much territory in my neighbors wild yard. Maybe a bird net will hamper them--at least slow them down.

It is definatly cardinals here
Only the upper peas are stripped
I have a lot of voles that destroy plants and sometimes chew on peas,,shell and all
They tend to like poles and fence lines and we find many of their quarter sized holes when cleaning up
We have used Decon and Juicy Fruit gum without making a dent in their population
Charlie

I wrapped the entire trellis in taut bird netting last week, and so far so good!