I thought this was a fun contrast of jays feeding at Sax Zim Bog. Here we have the gray jay feeding on the deer rib cage--something that they would feed on naturally in the wild if say a wolf had killed a deer and the cage was exposed to the elements:

And here we have a blue jay feeding on a suet cage with a flavored suet cake--suet that has evolved over the last few decades. It's gone from being just fat from a carcass to a melted down substance with nuts and seeds and who knows what else added to it for flavor.

I love the blue jay bouncing on the thin branch and the cage swings to and fro.