<p>The full dataset analysed by Hardie and Cooney, 'Sociality, ecology and developmental constraints predict variation in brain size across birds'.</p>
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<p><strong>Field descriptions:</strong></p>
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<p>TipLabel – Species binomial following the taxonomy of Jetz et al. (2012) <em>Nature</em></p>
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<p>Brain_Size_mL – Brain volume measurements obtained from Ksepka et al. (2020) <em>Curr Biol</em></p>
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<p>Body_Mass_g – Body mass measurements obtained from Ksepka et al. (2020) <em>Curr Biol</em></p>
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<p>Cooperative – Information on presence or absence of cooperative breeding obtained from Tobias and Pigot (2019) <em>Philos Trans R Soc Lond B</em></p>
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<p>Sociality – Information on species' degree of sociality [1 = ‘solitary’, 2 = ‘weakly social’, 3 = ‘highly social’] obtained from Tobias et al. (2016) <em>Front Ecol Evol</em></p>
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<p>Territoriality – Information on species' degree of territoriality obtained from Tobias and Pigot (2019) <em>Philos Trans R Soc Lond B</em></p>
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<p>Diet – Information on species' dietary category obtained from Tobias and Pigot (2019) <em>Philos Trans R Soc Lond B</em> </p>
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<p>Diet_Simple – A simplified version of the 'Diet' variable (see main text for details)</p>
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<p>Foraging_Niche – Information on species' foraging niche obtained from Tobias and Pigot (2019) <em>Philos Trans R Soc Lond B</em> </p>
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<p>Foraging_Niche_Simple – A simplified version of the 'Foraging_Niche' variable (see main text for details)</p>
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<p>Migration – Information on species' migratory behaviour obtained from Tobias and Pigot (2019) <em>Philos Trans R Soc Lond B</em></p>
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<p>Dev_Mode – Measurements of variation in species' development mode obtained from Ducatez and Field (2021) <em>Evolution</em></p>
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<p>Clade – Species' taxonomic group following the scheme used by Cooney et al. (2017) <em>Nature</em> </p>
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<p>CladeFit – A modified version of the 'Clade' variable (see main text for details)</p>
Funding
The role of sexual signal evolution in speciation and species coexistence