Fig. 1: Kin-biased helping in superb starlings.
From: A cryptic role for reciprocal helping in a cooperatively breeding bird

Posterior probability distributions (with means and 95% Bayesian credible intervals) are shown for the standardized regression coefficients for kinship as a predictor of helping, across all helpers (circle, violet), or within residents (triangles) or immigrants (squares) that are male (blue) or female (red). The category ‘All’ includes individuals of unknown dispersal history. The regression coefficient for kinship represents the increase in the helping rate corresponding to a 1 s.d. increase in kinship (for example, from r = 0 to r = 0.19). Regression coefficients, sample sizes and convergence diagnostics are provided in Extended Data Table 2.