I have noticed this while in ND because I think the birds are a lot more wary now because of the hunting pressure. While hunting in canada we almost always have geese flying by legal light. I don't know why, but in Canada we usually see a higher ratio of young birds then we see in ND, maybe this has something to do with them flying earlier. Most mornings a single will come off of the roost while it is still too dark to see it until it is right in front of you. The big flight of geese usually consistantly get up about ten minutes after shooting light in Canada. Canada is a lot like ND in the good years. I doubt I am going to make it up there this year and through college and I will miss, but I guess I will be able to afford a lot more trips with a college education.