As the weather cools and the world gets buried in white winter, we begin to set up our patio bird feeders and wait for them to be discovered.  Living in Eastern Canada, we tend to see blue jays, cardinals, chickadees, nuthatches, grey jays, mourning doves and pileated, downy and hairy woodpeckers.  With these new visitors beginning to come by each day, a study of birds was definitely in order!  Miss 7 noticed as the leaves fell off the trees in the fall, the birds’ abandon nests were more visible, we…