Wild hen pheasant sat on eggs that haven't hatched

Hello,

there is a wild pheasant who is sitting on eggs in the garden. She has been sat on them now for almost 2 months. She used to come off and get food then go back and sit on them but now she doesn't leave them at  all. There are 8 eggs in total but the incubation time has well and truly passed. She is visibly getting weaker. 

will she abandon them herself or is there something I can do to intervene and give her a chance to survive? She's been sat on them since the middle of may. 

many thanks for any advice