Very diverse. harlequin ladybirds have
strong dispersal capabilities and can be found in many
places. Most commonly found on deciduous trees, such
as lime, sycamore and maple, and on low growing plants
such as nettles. Will also inhabit reedbeds, coniferous
woodland and crop systems.
Like all ladybirds, the harlequin ladybird
undergoes complete metamorphosis and as such has an
egg, larval, pupal and adult stage. Pre-adult development
takes about 14 to 20 days at 25ºC and adults can
begin to lay eggs after 5 days. A single female can
lay over a thousand eggs.
Harlequin ladybirds feed most commonly on
aphids, but have a wide food range, also feeding on
scale insects, adelgids, the eggs and larvae of butterflies
and moths, many other small insects, including other
ladybirds, pollen, nectar, and sugary fluids, including
honeydew and the juice from ripe fruits.