Can robins anticipate an early autumn and return to their wintering grounds earlier than normal?
Robin migration seems to coincide with the time when berries are very abundant, perhaps so that they can feed along the way. They move faster when we get high-pressure systems with cold fronts. The last half of September, 1988, there were a lot of rainy days, which kept robins from flying much. It cleared up on October 1, and that morning I counted 62,707 robins flying along the north shore of Lake Superior. They had all been waiting until conditions were right for moving. Can they predict the future? I have a very hard time imagining how they could. But no one really knows for absolute certain–except of course for the robins. But they’re not talking. From: Wisconsin Pidgeon River Elementary jarnoldi@sheboygan.k12.wi.us Q: Why do Robins have blue eggs? A: Just about all thrush eggs are at least partly blue. It’s hard to say why. Perhaps the bluish-green in the shade of the nest makes them appear camouflaged in the dappled light of tree branches. Actually greenish-blue is similar to th
