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..尹(yǐn )夏(🙋)沫（黄灿灿饰(😪)）和(hé )洛熙（(🥁)严禹豪(⬅)饰(🛺)）因同(😷)(tóng )是孤儿(⤴)的身份让彼此互(🎃)相(🤗)吸引(yǐn )。现在，真的可以(🙀)称(✔)作(🛴)是(🥓)天仙的天使又来到(💊)自(🕥)己面(🤸)(miàn )前。这些黑衣人似(sì )乎知道他们(🧀)的行(🌷)动(dò(🌍)ng )路线(📍)，早(🎵)有准(zhǔ(👖)n )备。悦颜闻言，立(👵)刻就放下手来，点了点头，道：没事了，之前我出去(⬜)玩(wán )了几天(tiān )，就(⚓)是乔司宁陪着我的那几天，其实那(nà )之后就没事了本(〰)片(piàn )号(hào )称越南第一(yī )部(❎)(bù )武侠大片。6位明(📚)星好友玩家，意外登录(😎)神秘圆鱼洲(zhōu )。陶可蔓像是(🐟)听了什么笑话：什么aa，这(zhè )点小钱我出就(jiù )好了(le )，都是室友不用计较。要不然让(🤛)阿(ā(🚻) )姨(🦏)每周(zhōu )来大(✂)扫除一次(cì )好(🏄)了，我(wǒ )们住着(🚩)也舒服。乔唯(🚬)一也说不清自己(🌜)(jǐ(🙃) )是(📣)什么心(🎻)情(🕯)，晚上离开(kāi )谢婉筠(🏤)家(💘)之后，忍不住给容(🕔)隽(💄)打了个电话。