We see many spring happenings in May in the Northland. There is always the interesting and dynamic migration of birds. Whether it is raptors, waterfowl or the abundant songbirds, the avian flight continues throughout the month. Young of many critters are now here: rabbits, squirrels and deer, as well as the next batch of anurans (frogs and toads) calling from the wetlands — gray tree frogs and toads. Insects become more common around us, and we …