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~ a celebration of nature

earthstar

Tag Archives: harlequin ladybird

The ladybird lifecycle

09 Tuesday Aug 2016

Posted by sconzani in insects, nature

≈ 7 Comments

Tags

Halyzia 16-punctata, harlequin ladybird, Harmonia axyridis, ladybird, ladybird larva, ladybird lifecycle, ladybird pupa, Orange ladybird

Just like every other insect, a ladybird goes through a complete transformation during its short, one-year life but the various stages are something I’ve only become aware of this year so I thought I’d share them with you.

160809 ladybird (1) 22 spot
160809 ladybird (2)

Adult ladybirds spend the cold winter months in a dormant state, awakening in the springtime as the weather begins to warm up. After munching away on some aphids to get their juices flowing again, they look for a member of the opposite sex and mate. I don’t have any egg photos but they are, apparently, bright yellow and are laid on the underside of leaves. Once the mating and egg-laying are complete, the adult ladybirds die.

160809 ladybird (3)
160809 ladybird (4)
160809 ladybird (5) orange Halyzia 16-punctata

Depending on the temperature and weather conditions, the eggs hatch after 3 to 10 days and the little larvae immediately begin eating: scale insects and aphids are their favourites so you can see why gardeners love them. At this stage, they look nothing at all like ladybirds, though they do have unique patterns – left and centre above are Harlequins (Harmonia axyridis) and the one on the right is an Orange (Halyzia 16-punctata).

160809 ladybird (6)
160809 ladybird (7)

After 3 to 4 weeks of constant eating, the larvae pupate, shedding their larval skin and changing into this strange-looking blob you can find attached to the tops of leaves. The metamorphosis from larvae to adult ladybird only takes 7 to 10 days – a miracle really!

160809 ladybird (8)

When the adult ladybird first emerges from its pupa, it is very pale and takes a little while for its final colours to show, though you can usually see traces of its spots. And that’s it! The adult will trundle around the leaves, eating all those pesky aphids until the winter months come, and the whole process will begin all over again.

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Springtime in the shrubbery

16 Monday May 2016

Posted by sconzani in insects, nature, spring

≈ 4 Comments

Tags

crane fly, Green dock beetle, harlequin ladybird, St Mark's flies

I took myself off on a long walk yesterday afternoon, no backpack full of camera gear, just my point ‘n’ shoot in my hand, intending to walk not look for critters. But, no sooner had I got to the start of the walk proper than the critters began presenting themselves, and I began to feel rather like a voyeur.

160516 Harlequin Ladybirds

First it was the Harlequin ladybirds, on the very top leaves of a bramble so hard to miss, and three of them. Was the second female waiting her turn, basking in the afterglow, or something of a voyeur herself?

160516 Green Dock Beetle

A metallic flash on the neighbouring bush caught my eye and there were a couple of Green dock beetles, also getting into the swing of spring, though I think the male was a little confused as to how to go about things. He won’t accomplish much just riding on the female’s back.

160516 crane flies

Further on, I bent down to re-tie my shoelace and what should I see but two Crane flies, making more Crane flies.

160516 Long-horned black legionnaire

And I almost stood on these final two, blatantly having it off in the middle of the footpath. I think they’re Long-horned black legionnaire beetles**, though I’m not entirely sure. They, like all the other minibeasts, were certainly feeling stimulated by the Sunday sunshine.

** Many thanks to Paul Challinor. These are actually St Mark’s flies (Bibio marci).

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There’s a cannibal in my kitchen

12 Saturday Dec 2015

Posted by sconzani in insects, ladybird, nature, nature photography, winter

≈ Leave a comment

Tags

harlequin ladybird, hibernation, insect, invasive species, ladybird, ladybug, winter

For the third time in as many weeks a Harlequin ladybird (Harmonia axyridis) has appeared as if from nowhere in my kitchen. They like to find somewhere cosy to hibernate the winter away so I’m sure a warm spot near my gas boiler would suit them very well and normally I wouldn’t mind but this is the most invasive ladybird on earth.
151212 ladybird harlequin (1)

The voracious little Harlequin originated in Asia but was introduced firstly to North America and later to Europe to control aphids. Though it only arrived in Britain in 2004 – perhaps blown across the Channel, or it may have hitched a ride on a vehicle – it has already spread throughout half these isles. The problem is that the Harlequin doesn’t just eat aphids; not only does it compete with native ladybirds for food but it also devours their eggs and larvae, as well as the eggs and caterpillars of butterflies and moths. It may look cute but it has the devastating potential to wipe out all 26 resident species of ladybird.

This is one time when I really wish this ladybird would fly away home!

151212 ladybird harlequin (2)

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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