div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentpollinators-monarch-help-track-monarch-migration-since-the-1970s-scientists-havehtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: pollinators monarchHelp track monarch migration Since the 1970s scientists have used a technique called tagging to study monarchs migratory movements This is done by gently applying loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220423105ed75f48acc46829cb3402f6html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentpollinators-monarch-help-track-monarch-migration-since-the-1970s-scientists-havehtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: pollinators monarchHelp track monarch migration Since the 1970s scientists have used a technique called tagging to study monarchs migratory movements This is done by gently applying loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220423105ed75f48acc46829cb3402f6html5thumbnails2jpg width=140 height=200 divdiv