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.AndintheMexicanstateofMichoacá(🌴)n,NOVAjoinsmountainvillagersastheycelebratethearrivalofthemonarchsinthefirstweekofNovember.ThebutterfliesarrivalmarksthestartofacelebrationcalledtheDayoftheDead,sincethelocalpeoplehavetraditionallyassociatedthemonarchswiththereturningsoulsoftheirdepartedancestors.Unfortunately,illegalloggingintheMexicanbutterflysanctuariesthreatenstheuniquehabitatthatmonarchsdependonfortheirsurvival.Monarchsmaynotyetbeanendangeredspecies,buttheirannualmigrationisanendangeredphenomenonthatcoulddwindletoinsignificanceifthegiantfirsthattheyclingtoduringthewinterdisappear.Gonealsowouldbethecolorfulfestivalthatclosestheprogram—afireworksdisplaywelcomingthehardyflierstoMexico,withorangeburstsagainsttheblacksky,lookingalmostlikethebeautifulcloaksofthemonarchs..新闻中(zhō(🔜)ng )，正在播放一则报(🐸)道。前面(👐)带路，要是(🥨)(shì )口蹦半个(🉑)不字(👘)，咱们可(kě )要(🈲)撕票(🧓)了。张春桃此时怔忪的看了一眼那桶猪(zhū )血，开口说道：那就(jiù )听(📓)你的(🚚)，不过咱们吃这东(🔅)西(🗜)，可是万(☝)(wàn )万(⌛)不要给人知道了。陆与川听了，忽然又笑了一声，道那如果我不改(gǎi )变(biàn )，她会怎么(😕)做？与(yǔ )我为敌，揪着我不放？此去经(jīng )年(💇)，阿悟严格执行(háng )着作息表，他视极真空手道(🕢)宗师大山倍达为偶像，发誓保护所有团(tuán )地(dì )的(🚀)好(hǎ(🔖)o )伙伴。不曾(🔷)想，绾(wǎn )绾这段时间经历过地狱。周(zhōu )氏(shì )看着张大湖，温声说道(dào )：大湖(🔤)，你怎么(me )就想不(🕵)明(⛺)白(🐩)呢(ne )，咱(zán )们(❄)其实才是真正(🅱)的(🙇)一家(❎)(jiā )人，外面那些人，对你(⚓)到底(dǐ )好不好，难道你的心(xīn )中(zhōng )没数？司霆吃(🧠)饱喝足，才又看了(🛠)一(😥)眼跟平常状态大不相同的(de )慕(⬆)浅，你被(🍒)病毒感染了？