Canadian geese are known to fly in a "V" shape pattern as they migrate across the country. The lead goose in the "V" cuts through the air making it easier for the rest of the geese behind him. As that lead goose becomes tired, he will drop off and join one of the sides and a new lead goose will take over. This is done several times as they are flying long distances.
Q: So if you look up in the sky and see a "V" shape pattern of geese flying overhead and one side is longer than the other, do you know what that means?
A: There are more geese on that side.
Q: And if you see a family of geese crossing the street, do you know what that means?
A: They have just landed and they are taxiing back.