For wild animals, selfishness is often the ticket to survival. But some animals help each other, even when it's not clear what the payoff is.
Keywords:Middle school 6-8,Intermediate elementary 3-5,NSDL_SetSpec_BEN,Lizards,oai:nsdl.org:2200/20110722020240021T,Learner,Behavioral Science,Research,Wildlife science,Crows,Reference Material,Life Science,Article,Education,Social Sciences,Non-journal article,NSDL
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