Data for: Sociality, ecology and developmental constraints predict variation in brain size across birds

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