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　　今??(jin)春??(chun)??，首??(shou)批??(pi)白??(bai)頭??(tou)鶴??(he)、白??(bai)枕?(zhen)鶴??(he)、東??(dong)方??(fang)白??(bai)鸛?(guan)已??(yi)經(jīng)?(jing)順??(shun)利??(li)抵??(di)達(dá)?(da)??。?該?(gai)保??(bao)護(hù)?(hu)區(qū)??(qu)管??(guan)理??(li)局??(ju)保??(bao)護(hù)??(hu)科??(ke)科??(ke)長(zhǎng)??(chang)于??(yu)立??(li)彬??(bin)介?(jie)紹??(shao)??，它??(ta)們??(men)到??(dao)來(lái)??(lai)的??(de)時(shí)??(shi)間??(jian)較??(jiao)往??(wang)年??(nian)提??(ti)前??(qian)了??(le)十??(shi)余??(yu)天??(tian)??，氣??(qi)候??(hou)波??(bo)動(dòng)??(dong)與??(yu)遷??(qian)飛??(fei)路??(lu)線??(xian)充??(chong)足??(zu)的??(de)食??(shi)物??(wu)補(bǔ)秘(bu)給??(gei)??，讓??(rang)這??(zhe)些??(xie)精??(jing)靈??(ling)調(diào)??(tiao)整??(zheng)了??(le)行?(xing)程??(cheng)??。　　潘??(pan)晟?(sheng)昱??(yu)亦??(yi)指??(zhi)出??(chu)??，觀??(guan)察??(cha)發(fā)??(fa)現(xiàn)??(xian)候??(hou)鳥(niǎo)?(niao)北??(bei)遷??(qian)時(shí)??(shi)間??(jian)出??(chu)現(xiàn)??(xian)提??(ti)前??(qian)現(xiàn)??(xian)象??(xiang)??，抵??(di)達(dá)??(da)過(guò)??(guo)早??(zao)可?(ke)能??(neng)遭??(zao)遇??(yu)“倒??(dao)春??(chun)寒??(han)”??，導(dǎo)??(dao)致??(zhi)食??(shi)物??(wu)短??(duan)缺祝(que)和??(he)雛??(chu)鳥(niǎo)??(niao)凍??(dong)亡??(wang)??。??因?(yin)此??(ci)??，每??(mei)年??(nian)遷??(qian)徙??(xi)季??(ji)的??(de)觀??(guan)測(cè)??(ce)和??(he)護(hù)??(hu)飛??(fei)工??(gong)作?(zuo)變??(bian)得??(de)更??(geng)加??(jia)重??(zhong)要??(yao)??，目??(mu)前??(qian)吉??(ji)林??(lin)各??(ge)處??(chu)濕??(shi)地??(di)都??(dou)有??(you)巡?(xun)護(hù)??(hu)隊(duì)??(dui)伍??(wu)??，為??(wei)候??(hou)鳥(niǎo)?(niao)構(gòu)??(gou)筑??(zhu)安?(an)全祝(quan)遷??(qian)徙??(xi)保??(bao)障??(zhang)網(wǎng)??(wang)??。(完??(wan))。