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2018 ; 8
(1
): 8095
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Iridescence impairs object recognition in bumblebees
#MMPMID29802387
Kjernsmo K
; Hall JR
; Doyle C
; Khuzayim N
; Cuthill IC
; Scott-Samuel NE
; Whitney HM
Sci Rep
2018[May]; 8
(1
): 8095
PMID29802387
show ga
Iridescence is a taxonomically widespread and striking form of animal coloration,
yet despite advances in understanding its mechanism, its function and adaptive
value are poorly understood. We test a counterintuitive hypothesis about the
function of iridescence: that it can act as camouflage through interference with
object recognition. Using an established insect visual model (Bombus terrestris),
we demonstrate that both diffraction grating and multilayer iridescence impair
shape recognition (although not the more subtle form of diffraction grating seen
in some flowers), supporting the idea that both strategies can be effective means
of camouflage. We conclude that iridescence produces visual signals that can
confuse potential predators, and this might explain the high frequency of
iridescence in many animal taxa.
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