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| ... 25 - 26 mm in length. The width of the body, at the 6th or 7th segment, is about 8 mm. The encrusted ocelli are at the front of the relatively small head. The antennae consist of 7 segments. The larvae overwinter twice in water and leave those on a plant stem, 2 to 3 years after they have hatched from their eggs. The new generation of black-lined skimmers hatch at the end of May. | | |
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| Mating takes place in late spring or early summer in sunny weather. The fertilized females lay their eggs from the air while clinging to the male (tandem flight). The eggs are attached to plant parts located under the surface of the water. | | |
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| Two-tailed pashas prefer to live in habitats in which strawberry trees (genus Arbutus) grow. This is the food plant of their caterpillars. The adult butterflies live on rotting fruit, excrement and sweat and can fly well and fast. They can be watched in their flights for hours. Male specimens of two-tailed pasha guard their territory and fend off competitors from... | | |
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| ...f litter or directly in the ground in which they remain, sometimes even for years, resting before they pupate. Adult Tenthredinidae have lifespans of only a few days or a few weeks. Tenthredinidae include some species that are economically important plant pests. | | |
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| ...s brood parasites and nomada bees, the cuckoo bees lay their eggs into the nests of Andrena. Other parasites are the blister beetle, Bombyliidae and Strepsiptera.Andrena, like many wild bees, are of major ecological importance due to their role as plant pollinators. | | |
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| Excentricus planicornis are often found on ruderal plants, especially herbs, deciduous trees or shrubs. Adults can be encountered from June to October. They prey on aphids, psyllids, tortrix moth caterpillars, ermine caterpillars and other arthropods. Occasionally, they also eat plant parts (berries, buds etc.). | | |
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| After mating, the fertilized females lay their eggs on plants. The eggs overwinter. The larvae which hatch in late April, are also predatory. Excentricus planicornis are considered useful as they destroy many plant pests and are especially appreciated in orchards. | | |
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| ...iod from April to October, it occurs more frequently and is found in various habitats. They occur in particularly large numbers everywhere where old, rotting meat or faeces can be found. The adults often sit on trees, shrubs and herbaceous flowering plants, where they feed on nectar, sweet plant juices, ripe fruit juice or honeydew from aphids. However they also like the protein-rich fluid from dung or carrion. Some of the adult flies overwinter. | | |
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| ... way of life of most parasitic mites varies considerably. Many species are very slow moving and use animals as a form of transport while sucking their blood. Even the diet of different species varies greatly. Mites live from bacteria etc... or from plants or plant parts, fungi, carrion, dead tissue (eg skin flakes) or fat. | | |
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| Mites both carry and cause diseases and can trigger allergies (house dust mite). They can also cause damage where food is stored (Acarus siro). Some types of mites, however, are useful. Gamasid mites exterminate plant pests and some species are put to good use in the production of certain cheeses. | | |
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