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　　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?(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??(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??(que)和??(he)雛??(chu)鳥??(niao)凍??(dong)亡??(wang)??。??因??(yin)此??(ci)??，每??(mei)年??(nian)遷??(qian)徙??(xi)季??(ji)的??(de)觀??(guan)測??(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??(niao)構(gòu)?(gou)筑??(zhu)安?(an)全?(quan)遷?(qian)徙??(xi)保??(bao)障??(zhang)網(wǎng)??(wang)??。(完??(wan))　　在??(zai)東??(dong)部??(bu)的??(de)琿??(hun)春??(chun)敬??(jing)信??(xin)濕??(shi)地??(di)??，雁??(yan)群??(qun)蔽??(bi)日??(ri)??。??對??(dui)棲??(qi)息??(xi)環(huán)?(huan)境??(jing)極??(ji)為??(wei)挑祝(tiao)剔??(ti)的??(de)白??(bai)尾??(wei)海??(hai)雕??(diao)、虎??(hu)頭??(tou)海??(hai)雕??(diao)等??(deng)猛??(meng)禽??(qin)也??(ye)結(jié)??(jie)隊(duì)??(dui)到??(dao)來??(lai)??，它??(ta)們??(men)在??(zai)冰??(bing)面?(mian)踱?(duo)步??(bu)、起??(qi)舞??(wu)??，上??(shang)演?(yan)奪??(duo)食??(shi)大??(da)戰(zhàn)??(zhan)??，難??(nan)得??(de)一??(yi)見??(jian)的??(de)精??(jing)彩??(cai)瞬??(shun)間??(jian)被??(bei)堅(jiān)??(jian)守??(shou)在?(zai)此?(ci)的??(de)中??(zhong)外??(wai)攝?(she)影??(ying)師??(shi)記??(ji)錄??(lu)下??(xia)來??(lai)??。。