The wait for the winter migration is finally over as the first birds have arrived. The Pacific Flyway migration route goes through California’s Great Central Valley bringing millions of birds into the valley during the next month. By November huge flocks of geese, ducks, swans and various shorebirds and songbirds will be living in dozens of National Wildlife Refuges (NWR), state refuges, private reserves and fallow farmlands. But the bird everyone seeks is the stately Sandhill Crane.