ScienceDaily Posted February 26, 2014 Share Posted February 26, 2014 A new study of territorial songs used by chipping sparrows to defend their turf reveals that males sometimes will form a "dear enemy" alliance with a weaker neighbor to prevent a stronger rival from moving in. For the first time findings demonstrate the birds' use of a stereotyped, specialized signal, in this case chipping sparrow trills, to establish brief periods of cooperation among neighbor birds who are otherwise rivals. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
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