Correction to: Nature Ecology & Evolution https://doi.org/10.1038/s41559-024-02451-3, published online 8 July 2024.

In the version of the article initially published, in the first paragraph, the equations now reading “y = axb, where y = brain mass, x = body mass, a = the intercept and b = the allometric coefficient” and “log(y) = log(a) + blog(x)” originally read “y = bxa, where y = brain mass, b = body mass, x = the intercept and a = the allometric coefficient” and “log y = a (log b + log x)”. Additionally, Extended Data Fig. 3 was missing, while in the last paragraph of the Results, the two callouts to Supplementary Fig. 2 now cite Extended Data Fig. 3. The changes have been made to the HTML and PDF versions of the article.