Geese sharing sitting duties

We have a pair of Toulouse geese, and they are sitting on their first batch of eggs.  Mostly it's the female who sits on them, but if she gets up to stretch her legs, the male takes over, fussing around checking that they are all tucked in neatly and then sitting down to his share of the brooding process.  Sometimes we find him tucked up by her side, as though he'd like a turn but she won't get off. 

They are totally devoted to each other, and it's incredible cute, but is it normal? 

I know Canada geese share rearing duties once the chicks hatch which is the reason male and female geese look the same unlike ducks where the males have nothing to do with raising chicks. I think I also read somewhere about Canadian geese sharing the incubation duties as well due to nesting in colder areas. I would gather that, if I am remembering correctly, if one type of goose shares incubation duties that others would. 

Peter K. wrote:
I know Canada geese share rearing duties once the chicks hatch which is the reason male and female geese look the same unlike ducks where the males have nothing to do with raising chicks. I think I also read somewhere about Canadian geese sharing the incubation duties as well due to nesting in colder areas. I would gather that, if I am remembering correctly, if one type of goose shares incubation duties that others would. 

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Peter K. wrote:
I know Canada geese share rearing duties once the chicks hatch which is the reason male and female geese look the same unlike ducks where the males have nothing to do with raising chicks.

The two geese *do* look pretty much identical and it does make a lot of sense - thanks for that Peter.  Unfortunately none of the eggs hatched.  They are a young pair with their first batch of eggs and I don't think any of the eggs were even fertile.  The female gave up on them about ten days ago a week after they were due to hatch, but the male wouldn't give up till the day before yesterday, and even then we had to give a bit of encouragement to persuade him it wasn't worth wasting any more energy on.  He's still looking a bit haggard, but the female looks like she's got her strength back so maybe they'll have another go soon.  I'll try to get photos next time as it was really rather cute.