Gosling gone

The geese in the park have hatched their babies. They had four, but are down to three - the one, I fear, who was always off by himself. The gander was always nervy - I think the gander, I assume the goslings hung around mom while dad stood guard, staring and hissing at passers-by - he wasn't sure whether to chase the stray or stick with the family; he usually did the latter. He's very protective, but he can't be everywhere...