Maggie, I poked through another site very quickly on last years posts about this couple and they only had 2 hatch out of 5 eggs. There was alot of commentary about the male here and his challenges in looking after the eggs but it seemed to be said in humourous tones - no dire commentary. Perhaps he is young and not experienced.
Maybe if Alison drops by she can give us accurate information as she is more familiar with these sites.