A statue in the hall of the river bend hospital

I found this interesting. It was put in the main hall in the hospital before Halloween. I think it is for Halloween.

Here is the base.


The other side of the base.

And then Keep look up, there is the horse.

Here we go, the lady with a bird on her hand and nest on her head.

Here is the whole picture. I am not sure what it means though.

The different view. Can anyone tell me what the statue trying to tell?