A Record Count of Kirtland’s Warbler in the Upper Peninsula of Michigan Reported by the US Forest Service This year was the 23rd consecutive year of searching young jack pine in the Upper Peninsula for the federally endangered Kirtland’s Warbler. In June, census participants counted 53 singing males, in 7 counties, across federal, state, county … More CENSUS RESULTS ARE IN FOR KIRTLAND’S WARBLERS IN THE U.P.