| http://www.w3.org/ns/prov#value | - These crests can be concealed or displayed at will, and individuals of both sexes perform crest displays in various contexts, including when being handled by potential predators such as humans (e.g. Graves 1990; M. G. Meadows 2006, personal observations).5.8.3 Warning coloration Iridescent colours may also serve to warn predators of the potential unpalatability, or even toxicity, of potential prey
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