Can you identify this weird bone? (skull?)

While on a hike today, we found the weird bone pictured in the blog post below. This was in a wooded area near a marsh in western Massachusetts, USA. The size is kind of impressive, though the whole thing is quite light. The side views below make it look like a skull, but given that something like a spine appears to run along the entire underside, I’m not sure about that identification.

Any of the SDMB zoologists & naturalists want to weigh in?

Gallery of bone photos, with water bottle for scale.

It’s like the pelvis of a bird.

Concur. Save it, and compare it with what you get the next time you cook a chicken.

Compare to this turkey pelvis somebody is selling, displayed with a ruler:

http://www.etsy.com/listing/90363556/turkey-pelvis

Yeah, from the size I would say turkey pelvis. Here’s a similar view of a chicken pelvisfor comparison.

Given that it was a marshy area, I wonder if it might be a heron pelvis. Blue heron pelvis here, about a third of the way down the page.

The heron pelvis is much too narrow, and the part around the spinal cord is much thicker. It differs in quite a number of other features.

I wondered about that too; but the bone looked fresh enough to me that I doubt it was there all winter, and the herons haven’t migrated back up here yet. Plenty of wild turkeys in the woods around here, though, year-round.