House sparrows establish foraging flocks by giving chirrup calls if the resources are divisible

@article{Elgar1986HouseSE,
  title={House sparrows establish foraging flocks by giving chirrup calls if the resources are divisible},
  author={Mark A Elgar},
  journal={Animal Behaviour},
  year={1986},
  volume={34},
  pages={169-174}
}
Abstract Numerous studies have demonstrated that individuals benefit by joining existing foraging flocks. However, few have discussed mechanisms by which individuals might actively establish such flocks. This study presents experimental evidence that free-living, solitary house sparrows ( Passer domesticus L.) that discover a divisible food source usually make ‘chirrup’ calls to recruit other sparrows before foraging. However, a sparrow that locates a non-divisible resource tends not to chirrup… CONTINUE READING

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