Flora Graham, deputy editor, newscientist.com
(Image: Jan Stipala)
The
bright red colour of this luscious ladybird is more than just a lucky
omen - especially to predators. Its vibrancy indicates that it contains
more poisonous toxins than its paler peers.
A richer red is linked to a good diet in early life, says new research from
Jon Blount of the University of Exeter, UK. Blount and his colleagues found that better-fed ladybirds are more visible - and more deadly. It's the first time that scientists have linked individual differences in a species' warning signals - such as the intensity of a specific ladybird's red hue - to levels of toxicity.
Jon Blount of the University of Exeter, UK. Blount and his colleagues found that better-fed ladybirds are more visible - and more deadly. It's the first time that scientists have linked individual differences in a species' warning signals - such as the intensity of a specific ladybird's red hue - to levels of toxicity.
The researchers hand-reared ladybirds on different diets to measure how their food affects their looks and their defences.
Even
if you're not a ladybird predator, the innocent-looking bug can have
some brutal effects. Separate research published this week revealed
that the invasive non-native harlequin ladybird is decimating European species.http://www.newscientist.com
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