Relationship between wing size and eye size across sexes and seasonal forms. Eye size is positively correlated with wing size within a sex and a seasonal form (dashed lines). DS individuals, however, have larger wings and smaller eyes than their WS counterparts, leading to an overall negative correlation between wing size and eye size across all data points (black line) (males = squares; females = circles; open symbols = DS; closed symbols = WS).
Everett et al. BMC Evolutionary Biology 2012 12:232 doi:10.1186/1471-2148-12-232