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The winged insects are nocturnal and provide food for night-flying birds, bats, small mammals, amphibians and arthropods. The larval stage lasts much longer, often for one or more years, and has a bigger impact on the environment. [20] They form an important part of the diet of fish such as the trout. The fish acquire them by two means, either ...
A larva (/ ˈ l ɑːr v ə /; pl.: larvae / ˈ l ɑːr v iː /) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects , some arachnids , amphibians , or cnidarians typically have a larval phase of their life cycle .
Maggots feeding on an opossum carrion Maggots on a porcupine carcass Maggots from a rabbit. Common wild pig (boar) corpse decomposition timelapse. Maggots are visible. A maggot is the larva of a fly (order Diptera); it is applied in particular to the larvae of Brachycera flies, such as houseflies, cheese flies, and blowflies, [1] rather than larvae of the Nematocera, such as mosquitoes and ...
In other species, the larvae are insectivores, preying on aphids, thrips, and other plant-sucking insects. Insects such as aphids are considered crop pests, so the aphid-eating larvae of some hoverflies are economically and ecologically important. The larvae are potential agents for use in biological control, while the adults are pollinators.
Informally, such brachyceran larvae are called maggots, [66] but the term is not technical and often applied indifferently to fly larvae or insect larvae in general. The eyes and antennae of brachyceran larvae are reduced or absent, and the abdomen also lacks appendages such as cerci .
The nymph is the dominant life history stage of the mayfly. Different insect species vary in their tolerance to water pollution, but in general, the larval stages of mayflies, stoneflies (Plecoptera) and caddis flies (Trichoptera) are susceptible to a number of pollutants including sewage, pesticides and industrial effluent.
The fly larvae have been observed inside the devoured thorax and abdomen of the beetle. The flesh fly (Sarcophaga helicobia) has been observed to prey on both the larval and adult stage of the June beetle. The digger wasp (Scolia dubia) attacks the larval stage of the beetle. The female will crawl into the larva burrow and lay her eggs on the grub.
A cocoon is a casing spun of silk by many moths and caterpillars, [16] and numerous other holometabolous insect larvae as a protective covering for the pupa. Cocoons may be tough or soft, opaque or translucent, solid or meshlike, of various colors, or composed of multiple layers, depending on the type of insect larva producing it.
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