garette\rendsandothersmallpieces.Thebirdstakethe57(collect)trashtospecial\rbinswheretheycanreceivebirdfoodinexchange58puttingawaythelitter.\rParkpresidentNicolassaid,“Thepurposeofemployingthecrowsis\rtoeducatepeopletotakeuptheirsocial59(responsible).Sincethebirds\rareabletodo60wearemuchmoreabletodothanthem,weshoulddothis\rbyourselves?5\rCrowshavelongbeenobservedfbrtheirvariousamazing61(display)\rofintelligence.Theyareoneofthe62(smart)groupsofanimalsonearth,\rwithremarkableproblemsolving,toolmaking,anddeductive(演\r绎)reasoningskills.\rInadditiontoinspiringhumanstopickuptrash,theclevercrows\rcurrently63(work)attheparkareprettyexcitedtoputtheirintelligence\rtowork.\rHIthasbecome64excitinggameforthem/5Nicolassays.uTheypick\rupthetrashontheground,andeverydaythey65(reward)forwhatthey\rhavedone.'*
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