Hard times bring out the best in idle birds.
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References
Baglione, V. et al. Proc. R. Soc. B doi:10.1098/rspb.2010.0745
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Weaver, J. Lazy crows pitch in when it counts. Nature (2010). https://doi.org/10.1038/news.2010.272
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DOI: https://doi.org/10.1038/news.2010.272
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