I am now curious to know if he takes the same route each year or can change it up as needed??
He may have flown with a group the first time going and returning and then uses same route??
Me too.
They don't really travel in flocks, or groups. They do gather in the late summer in huge pre-migratory roosts, some numbering up to 250,000 birds. I've always though that they stayed in the roosts for weeks, but they don't. They only stay there a day or two, then head south. The roosts can last up to 6-8 weeks and don't vary in size much during that time, but birds are leaving heading south every day, and more birds are replacing them every day. The roosts show up on radar early in the mornings, starting in early June in the deep south, then in our area late June into July.
