A senior ecologist with the Schlitz Audubon Nature Center says bird enthusiasts will be able to watch more than 40 different species of birds as they fly into southeastern Wisconsin.  Those birds will be using southerly winds to make their migration north.  This year is unique because the spring’s weather patterns have prevented migration, says Don Qunitez.  He says they have been “stacking up” as they wait for more favorable winds.  Bird enthusiasts in Wisconsin can expect to see hummingbirds, orioles, and redstarts in big numbers the next two weeks.  The nature center will host a birding event next Sunday.