The seven 2008 ultralight-led whooping cranes at St. Marks National Wildlife Refuge began their spring migration north yesterday!  The four 2008 ultralight-led cranes that left the Chassahowitzka NWR on March 24 are currently being tracked north by ICF Tracking Field Manager, Eva Szyszkoski. Out of the 14 Class of 2008 ultralight-led cranes, only three haven’t begun their spring migration—they remain at the Chassahowitzka NWR pensite.