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| The females possess special glands to produce fibres which they use to build cocoons under water. Air is kept in these cocoons for the larvae to breathe. Water scavenger beetles feed on plants and rotting substances. Their larvae mostly live predatorily at the ... | | |
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| ...de as they swim. Their eyesight is not very developed. Therefore, it is possible for the beetles to land on? reflective surfaces (wet or shiny car roofs, windows, etc.) having confused them with open waters.
After mating, the oviposition of the females happens in cocoons near the surface of water where the eggs are glued to water plants. Approximately 8-10 days later the larvae (with body lengths of 3-4 mm) hatch. They increase rapidly in size . The larvae feed (starting at the lastest three day... | | |
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| The brassy willow beetle is active from May to September. It mainly feeds on the leaves of poplars and willow trees. The females lay their eggs on the food plants of the larvae, which are the same as those of the adult beetles.
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| The orange tip has a wingspan of 35-50 mm. The upper sides of the wings of both sexes are white. The outermost part of the forewings is grey to black-grey in the females, and orange in the males. This orange mark is characteristic of the species hence their name In the centre of the upper side of the forewings is a black spot, which is somewhat smaller on the males. The colouring of the underside of the forew... | | |
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| The upper surface of the hind wings of the males and females is white. The underside of the hind wings is likewise white but with yellow and black scales, which appear as greenish-white veining and serve as excellent camouflage. This effect is augmented by the male orange tip’s ability to rotate thei... | | |
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| During the mating season, (which is from mid July toAugust), the males can be observed on "patrol" flights, looking for females. During these, they often stay in the air. They fight with rival conspecifics when entering their territory. Mating almost always begins near the ground and often ends at the top of trees or bushes near water. | | |
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| Fertilized females bore holes into plants located on or just above the water surface and lay 20-30 eggs in total in these holes. The eggs overwinter. In the spring of the following year, the hatched larvae sink to the bottom of the water, where they stay for 2-3 y... | | |
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| Females lay their eggs on sitting or slow flying host animals, especially on bees, bumblebees, wasps, or sometimes grasshoppers. They cling to the host animal and lay eggs between the segments of their abdomen. The hatching larvae then eat their way into th... | | |
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| ...men can perceive ultraviolet light, but their eyesight is weak. Some species are covered in colourful ‘spikes’ which are visible under a microscope but the function of these has not yet been explained. In some species the males are darker than the females and are also larger. | | |
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| Cobweb spiders are small to medium in size and reach body lengths of 3-15 mm. The females often have a round or elongated abdomen. Body colour and markings vary, depending on type. They can be very vividly coloured . There are also many single-coloured species, which often have no markings. The bodies can be very hard and covered... | | |
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