Bird on a Hot Tile Roof

Do you suppose birds can suffer from dementia?  This is the third day I have seen this sparrow come back with food in her/his beak for the babies in the nest, but seemingly unable to find the nest...



Just further along, on a slightly higher roof, I can hear little birdy babies cheeping frantically, so it seems like they are the ones waiting for their dinner...


But does the bird go there?  No he flies off, the food still in his beak, and the birdy babies fall silent.