餵鳥器雖然受到屋主們的歡迎,但對野生動物來說可能帶來壞處。它們的好處會超越那些壞處嗎?PHOTOGRAPH BY JOEL SARTORE, NAT GEO IMAGE COLLECTION
餵鳥器可能引來松鼠和其它不速之客。PHOTOGRAPH BY MICHAEL FORSBERG, NAT GEO IMAGE COLLECTION
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