Serin
Crowing
That may hold true for cage birds, but I've seen poultry die on the nest from brooding for too long. Silkies are notorious for that, but other breeds of poultry/game birds will do it too. Unlike finches and other cage birds, poultry and game birds do not have mates that will feed them enough to survive and/or thrive on.
My button cock brings food to the sitting hen, is this unusual?
He will bring her crumbles or mealworms until she is stuffed.