|
|
| The heads of these flies are very small (hence their name ). The compound eyes of the males are almost joined? (holoptic eyes). On the sides of the thorax (chest) are large scales , under which the halteres (the balancing organ of a two-winged fly) are concealed. Some species have a very long, strong proboscis, which lies against the bel... | | |
|
| Flat-footed flies are small and reach body lengths of 2-3 mm. Their often compact and bumpy bodies are black or yellow in colour. Males are often darker than females. | | |
|
|
| Willow flea beetle | ...urope and Asia. This species can be found in every kind of environment , and is not endangered.
Crepidodera aurata reach body lengths of 2.5-3.5 mm. Its elongated and oval shaped body has a metallic sheen. The entire upper surface area of the females is greenish-gold in colour; that of the males is greenish-blue, blue or purple. Longitudinal rows of dots are visible on the forewings (elytres). The brown legs to the ankle are much thicker in the upper section of the rear pair, with which the willow flea can jump very far (up to hundred times...
...it is mainly seen on willows and poplars, whose leaves it eats. The willow flea beetle nibbles roundish holes into the leaves.
At age 7-8 months, the willow flea beetle is sexually mature. In June/August the beetles mate. The fertilized females lay their eggs on the leaves of the forage plants of their larvae. The eggs are yellowish and spindle-shaped.
The larvae hatch in summer. They are 5-6 mm long, black and resemble a small slug. The larvae live sociably on the same host plants (s... | | |
|
| 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... | | |
|
| The males are clearly identifiable due to their colouring, however female orange tips can be confused with other species such as the eastern bath white (Pontia edusa),the small white (Pieris rapae), the mountain dappled white (Euchloe simplonia), Anthocharis ... | | |
|
| Aeshna cyanea reach body lengths of 70-80 mm and wingspans of 90-110 mm. Their bodies are long and black and the females have bright green spots. The head is large and clearly separated from the thorax. The compound eyes are blue-green in the males and olive-green in the females. The chest section is mottled yellow to green and has black markings (base colour). Two yellow stripes are visible on the upper surface and sides of the chest. | | |
|
| ...like ponds, pools or small lakes. They move away in search of food, on regular flight paths and are often found long distances from home in forests or forest edges. They prey on flying insects, capturing them while flying at low levels and the males may show considerable perseverance. Southern hawkers defend their territory at the water against conspecifics as well as other species of dragonflies. | | |
|
| 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. | | |
|
| The female leaf-miner flies have an ovipositor at the end of their bodies. The adult Agromyzidae and their larvae live purely on vegetable substances (phytophagous) feeding on leaf tissue or other plant parts; the males live mainly off nectar and honeydew.
| | |
|
| ... their prey alive. Harvestmen 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. | | |
|
Seite 10 von 16 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
