Nestling polymorphism in a cuckoo-host system Nozomu J. Sato, Keita D. Tanaka, Yuji Okahisa, Masato Yamamichi, Ralph Kuehn, Roman Gula, Keisuke Ueda, Jörn Theuerkauf  Current Biology  Volume 25, Issue 24, Pages R1164-R1165 (December 2015) DOI: 10.1016/j.cub.2015.11.028 Copyright © 2015 Elsevier Ltd Terms and Conditions

Figure 1 Nestling polymorphism. A) Host nestlings (fan-tailed gerygone), aged ca. 3–4 days, of the dark (left) and bright (right) morphs hatched and reared in the same nest. B) A bright-morphed parasitic hatchling (shining bronze-cuckoo). C) A parasitic chick (top left) evicting a host chick (bottom right) from the nest, both dark-morphed (photo courtesy of Y. Létocart). D) Relative position of all measured skin colours in unit luminance jnd (just noticeable difference) in host parents’ vision in relation to chick type. Boxes are composed of medians with first and third quartiles and whiskers indicating ranges. Box widths represent the number of replicates (n = 66 in total). E) Observed clutch (green) and brood (orange) sizes, C (with illustration), irrespective of the polymorphism: light colour: C = 1; intermediate: C = 2; deep: C = 3. F) Observed frequencies (horizontal segments) of polymorphic, dark and bright monomorphic broods, and their expected frequencies (coloured bars) at Hardy-Weinberg equilibrium based on the observed phenotype frequency in chicks, assuming the dark morph to be either dominant (red) or recessive (blue). Bars show mean ± SD of simulated frequencies. See Supplemental Information for respective analyses in detail. Current Biology 2015 25, R1164-R1165DOI: (10.1016/j.cub.2015.11.028) Copyright © 2015 Elsevier Ltd Terms and Conditions