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AseabirdnamedLydiarecentlymadea26-daynonstop(不间断的)journeyofabout2,500miles,justtosearchforfoodforherbaby.Sheisfittedwithasatellitetrackingdevice(卫星跟踪仪).HertripstartedonOct.18fromChristmasIslandintheIndianOcean.Thetripisknownasthelongestnonstopjourneybyoneoftheseendangeredseabirds.
Beforethat,thiskindofbirdswasknownonlytoflyafewhundredmilesfromwheretheylive,stayingawayforjustafewdaysatatime.Theyusuallyflyoverthesea.ThescientistsfeelitstrangethatLydiamadesuchalong,nonstopjourneyandflewoverland.Sotheabovefactsraisesomeseriousquestionsabouteffortstostopthedecline(减少)ofthebirds.Thenumberofthebirdshasfallenby10percentoverthepast20years.
Besides,thescientistsaresurprisedthatshewasawayfromherbabyforsuchalongtime.Theywonderwhysheneededtogothatfar.Maybeitshowsthatfishresources(资源)aroundChristmasIslandarenotlargeenoughnow.Thatmightexplaintheslowdeclineofthebird一seapollutionisserious.
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