The picture seems to be off-center on the wall. I'd center it left-to-right on the wall. Hang at eye level for a person standing by lamp. If you had a larger frame and a larger mat, the piece would gain prominence. Another idea is to stencil on the wall a painted border that echoes the frame but suggests a much larger frame without actually reframing the picture.

If you are a collector, look for more natural history pieces of a smaller size and make a collage with the Audubon as the main piece.

I reframed many years ago. Updating my post

Beautiful! I’d love to see it in the room without the reflection of the windows in your picture. I think you got the colors perfect though.

No curtains on the windows