Fig. 2

Offspring back morph histograms for different combinations of parental back colours. The parental designation ‘light’ includes bird with back colours from 0–1.5, ‘mid’ includes back colours 1.5–3, and ‘dark’ includes back colours 3–4
Offspring back morph histograms for different combinations of parental back colours. The parental designation ‘light’ includes bird with back colours from 0–1.5, ‘mid’ includes back colours 1.5–3, and ‘dark’ includes back colours 3–4