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After 5 to 14 days the larvae hatch. At the end of the 3rd larval stage they are about 11 mm in length and pupate. The larvae of alder leaf beetles are first olive, later cyan and shortly before pupating bluish in colour. They have 2 rows of very hairy warts. The larvae, like the adult beetles, feed on the leaves of the grey or speckled alder (Alnus incana...
...er alone, by scraping the surface off the leaves from the underside, leaving only the veins, unlike the adults. eats the leaves from the lower surface by scraping them off. The development of the larvae is complete in 3 weeks (June/July). They pupate in oval spaces in the earth just beneath the surface of the soil, where they remain for 8 to 11 days. In August the beetles of the new generation leave their pupae. | | |
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| ... The dry leaves go brown or roll up. The larvae (cherry slug) produce no more mucus in the final stage of their development. In July, they drop from the leaf and immediately create an egg-shaped tissue below the soil’s surface, in which they quickly pupate. About 2 weeks later (in July and August), the adults of the 2nd cherry slug generation hatch, mate and lay eggs. The larvae (cherry slugs) are active from September to October. They also pupate and overwinter in the soil. They leave the pupae as adult cherry slugs in the spring. | | |
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The caterpillars of the last generation overwinter. They pupate in spring of the following year and emerge as adult butterflies in May. The adult brown argus butterflies are active from May to June. During this time they mate and reproduce. The fertilized females always lay their eggs on the host plants of their...
...hatching the caterpillars immediately begin feeding on the host plants and after about 60 days they have completed their development. They are greenish and have a pale line lengthwise on each side. When they have reached a length of about 20 mm they pupate. They hatch from the pupae from late July to mid September and produce the second annual generation of caterpillars which overwinter in leaves in frost free places. | | |
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| Mason bees | | ... pieces. ) They deposit pollen and nectar in each brood chamber for the future larvae before they start laying eggs. After oviposition the brood cell is closed with a seal. The hatched larvae feed on their food stock for some weeks before they pupate.
Some species overwinter as larvae, others as adult mason bees. The latter are already active in March. The natural enemies of mason bees include the larvae of cuckoo beeswho feed on the eggs of the mason bees and their food stores.
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| Robber flies | | ... their larvae They live in soil or in the woods and, like the adult flies, feed on other insects and their larvae (mainly on scarab beetles’ larvae, or on the larvae of beetles which live in wood). The larval stage takes 1-2 years before the larvae pupate.
Adult robber flies ambush other insects in flight. For this purpose they perch and wait. . If an insect is flying in their vicinity, the robber fly flies up into the air, attacks and stings. | | |
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| Lepidopterans begin life as caterpillars. They hatch from eggs and feed on plants before they pupate. After their metamorphosis, they hatch from their pupae as an adult butterfly (imago) to live on and store new eggs. Lepidopterans and caterpillars are able to camouflage themselves using colour and texture and even practice mimicry. | | |
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| ...flowering plants. The females lay about 150 eggs on the food plants of their caterpillars - Cruciferae, cabbage, Reseda, cress, mustard and radish - which hatch after a maximum of 8 days. The caterpillars are solitary. After moulting four times they pupate. If the pupae do not hibernate, the new butterflies emerge after 10 days. The small white produces 2 - 3 new generations a year. | | |
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| ...k stripe on its upper surface. The last segment bears the forked tail. The meadow brown is found almost everywhere, but is rare above 1600 metres.
Eggs are laid on the soil or on grass. The caterpillars shed their skin twice. They overwinter and pupate in May. The cocoon is spun on a blade of grass and is yellowish-green. The next adult meadow browns emerge in June.
The meadow brown is active from June to September. It reproduces once a year. | | |
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| ...uces 1 new generation a year and lays its eggs on the food plants of its larvae - honeysuckle and snowberry. The larvae overwinter in a piece of leaf formed into a kind of bag that serves as a hideout. The caterpillars emerge again in the spring and pupate in early June. | | |
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| ...dens. They are active from April to autumn. This species reproduces once a year.
The fertilized females of Anomoia purmunda lay their eggs in holes bored into the fruit of hawthorn. The larvae develop in the fruit and feed on it. In autumn they pupate and overwinter in the soil. | | |
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