Is this a bird fossil?

[JasonOR]

This fossil is in limestone. I don’t know where the limestone was quarried. It came out of a fireplace that was removed from a house in Lane county Oregon. I don’t know how old the house was as I never saw it. I have included a picture of the fireplace just in case that is helpful in any way.

 

Not all images have measurements and I apologize for that.

 

I ask if this is a bird because I feel like I see a small skull and bird feet, perhaps a pelvic bone and a breast bone. It also looks like feather quills. Maybe that’s just me wanting to see something. Any help would be much appreciated. 

[Rockwood]

Sorry, this doesn't look like a bird fossil to me. I'm not certain, but they look more like fragments of rudist bivalve to me. 

[Ludwigia]

You've certainly given us enough to look at, but I'm sorry to say that I'm also not seeing anything obviously bird-like here.

[JasonOR]

A bivalve would make more sense in limestone.
 

Here’s one more photo labeled with what I see. Just for good measure. 🙄

 

 

[TqB]

Fish fragments is my first impression...

[Mike from North Queensland]

I believe you have a partial fish skull with the sections you thought were feathers are the gills

[sjaak]

I also think it’s a fish.