【DDoyourememberthesong“Littleswallowwearsbrightclothesandcomeshereeveryspring”？Doyouwanttoknowwherealltheswallowsgoduringwinter?Theyflysouthinautumntostaywarrnandflybacknorthnextspring.Thist】

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　　   Doyourememberthesong “Littleswallowwearsbrightclothesandcomeshereeveryspring”？Doyouwanttoknowwherealltheswallowsgoduringwinter?Theyflysouthinautumntostaywarrnandflybacknorthnextspring.Thistypeoftraveliscalledmigration.

　　   Notallbirdsmigrate.Somewhodon’tneedtoworryaboutfoodliveinthesameplaceallyearround.Robinsforexanplecanturntofruitiftheycan'tfindwormsorinsects.Forbirdslikeswallowswhocan'tfindmuchfoodwinterisahardtime*PlantsdieandinsectshideTheswallowshavetomovetowarmerplaces.

　　   Thereareover1300kindsofbirdsinChina.MorethanhalfofthemmigratesaysHouYunqiuanexpertattheBirdBandingCentreofChina.Thisincludesswallowswildducksswansandwildgeese.

　　   Tostudymigrationscientistsbandmanybirdseveryyear.Somearecaughtagainorfoundaftertheydie.BycheckingthebandnumberwiththeBirdBandingCentrescientistslearnwherethebirdwasfirstbandedandhowfarittravelled.

　　   “Chinastartedbandingbirdsonlyabout20yearsago”’saidHouYunqiu.

　　   “There'sstillalotforustodiscover."

　　根据短文内容回答下列问题。

　　1.Whatdoesthefirstparagraphmainlytalkabout?

　　2.Whatisthemainreasonforbird^stomigrate?

　　3.Whichbirdsmentionedinthepassagedonotmigrate?

　　4.DowildducksflytothesouthinChina?

　　5.WhydowestarttheBirdBandingCentre?(请自拟一句话作答)