Colour change and substrate selection in larval Ischnura verticalis (Coenagrionidae: Odonata)

Larvae of Ischnura verticalis reared on either green or brown substrates showed significant differences in colour; larval colour tended to match that of the substrate. When presented with different-coloured substrates, both green and brown animals chose brown in preference to green. Preference for brown was not significantly altered by the presence of fish. Green larvae on green substrates were at significantly greater risk to predation by fish …