Winter Population Monitoring ReportsThe Winter Program involves informal banding as weather (especially temperature) and staffing permit. The winter season at MBO extends from October 31st to March 27.Browse the seasonal reports: 2015-2016 2013-2014 2012-2013 2011-2012 2010-2011 2009-2010 2008-2009 2007-2008 2006-2007 2005-2006