Thedocumentarydepictsmonarchbutterfliesgreatandmysteriousmigration.Eachyearsautumn,millionsofmonarchbutterfliesstarttheirincrediblesouthwardmigrationfromCanada,crossAmerica,toMexico.Theyflyabove2,000milestoarrivethemountainofMexico.....ThefilmopenswithcaterpillarsmunchingmilkweedinsouthernCanadainlatesummer.Sooneachcaterpillartransformsitselfintoasilkychrysalis.Roughly10dayslater,adelicatefour-wingedmonarchemerges.Then,atsomeunknownsignal,themonarchstaketotheaironatwo-month,2,000-mileflightoverfields,forests,cities,plains,openwater,deserts,andfinallymountainstocongregateinatiny,high-altituderegionofcentralMexicowheretheyveneverbeenbefore.Incredibly,theyarrivebythemillionsatthesametimeeachyear.Sheddinglightonthisnaturalwonderaresomeoftheworldsleadingmonarchresearchers,includingLincolnBrowerofSweetBriarCollege,independentbiologistBillCalvert,andOrleyChipTayloroftheUniversityofKansas.Puttingthemonarchphenomenonintoperspective,Taylorsays,YouvegotabutterflythatsoriginatinginToronto,oritsoriginatinginDetroit,Michigan,oritscomingdownfromSt.PaulormaybeevenWinnipeg,anditsmovingsouth.SomehowitfindsitswaytoMexico.Couldyoudothat?Nooneyetknowshowthebutterfliesdoit,butTaylorsresearchrevealsthattheyareexpertnavigators.Inoneexperiment,hetransportedMexico-boundmonarchsfromKansastoWashington,DC,andthensetthemloose.Atfirst,theyflewsouthasiftheywerestillinKansas—(💐)acoursethatfromWashingtonwouldmissMexicoentirely.Butafterafewdays,theycorrectedtheirflightpath,asifsomeinbornGPSunithadalertedthemtothetruedirectionoftheirdestination.Inanothersequence,NOVAaccompaniescelebratedmonarchwatcherBillCalvertaroundbackcountryTexasashelooksforsignsofthemonarchmigration.Sureenough,theyshowupenmasseandontime,headingtowardtheSierraMadremountainsacrosstheborder—thelastlegoftheirflight.AndintheMexicanstateofMichoacán,NOVAjoinsmountainvillagersastheycelebratethearrivalofthemonarchsinthefirstweekofNovember.ThebutterfliesarrivalmarksthestartofacelebrationcalledtheDayoftheDead,sincethelocalpeoplehavetraditionallyassociatedthemonarchswiththereturningsoulsoftheirdepartedancestors.Unfortunately,illegalloggingintheMexicanbutterflysanctuariesthreatenstheuniquehabitatthatmonarchsdependonfortheirsurvival.Monarchsmaynotyetbeanendangeredspecies,buttheirannualmigrationisanendangeredphenomenonthatcoulddwindletoinsignificanceifthegiantfirsthattheyclingtoduringthewinterdisappear.Gonealsowouldbethecolorfulfestivalthatclosestheprogram—afireworksdisplaywelcomingthehardyflierstoMexico,withorangeburstsagainsttheblacksky,lookingalmostlikethebeautifulcloaksofthemonarchs..原(🎁)来这(🎫)位(🚱)老先生并不(🥝)(bú )是(shì(😯) )什(shí )么得道(dào )的大(⛷)师，而是一个阴气太重的大(dà )恶人邪(⭐)王柳家人(🥒)如果有(yǒ(🤫)u )地(🆚)(dì )方求(🖖)助(🎣)，也不会跑(pǎo )到媳妇(📝)娘家住这么久了。人家林总是(shì(🍡) )什(🔔)么角色？大老(🚾)板啊。居然让他(tā )一不(bú )小心(xī(🏤)n )撞破这样的事情，不知道(🥐)头会不会杀他灭口？霍靳西在门(mén )口站着盯(🚠)着她看了许久，才终于回到床边，又(🏓)坐(zuò )下来，继续盯(🛥)着她(tā(🙋) )看。霍云卿听了，又(🔕)抬头看了(le )霍老(😭)爷子一眼(🈸)，却见霍老爷子正(zhèng )低头(tóu )看着(🦁)身旁(👾)的慕(🍷)浅，她(🏉)(tā )顿时(🕞)(shí )气上心(🎙)头，懒得(dé )再看，转头就(🕧)冲了出去。顾倾尔举起自(📣)己膝头的那本书，道(❇)：我(🚖)看书(💯)。许城扬起(🕣)(qǐ )自己的断臂，发出(chū )更加粗嘎(🧔)难听的笑。