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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 ...
Additionally, black soldier fly larvae are an alternative source of protein for aquaculture, animal feed, and pet food. [18] [28] The larvae are produced and processed in industrial-scale insect factories globally by biotechnology companies such as InnovaFeed and Protix, the latter operating the world's largest insect factory farm in the ...
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 .
Some species of insect that are submerged also have adaptations to aid in respiration. As larvae, many insects have gills that can extract oxygen dissolved in water, while others need to rise to the water surface to replenish air supplies, which may be held or trapped in special structures. [55] [56]
The larvae prefer dry places protected from the rain. When it first hatches, the tiny larva specialises in very small insects, but as it grows larger, it constructs larger pits, and thus catches larger prey, sometimes much larger than itself. [24] Other arthropods may make use of the antlion larva's ability to trap prey.
The larval stage is variously adapted to gaining and accumulating the materials and energy necessary for growth and metamorphosis. Most holometabolous insects pass through several larval stages, or instars, as they grow and develop. The larva must moult to pass from each larval stage. These stages may look very similar and differ mostly in size ...
The Pheasant Tail Nymph attracts trout by imitating a brown aquatic insect larva. In fly fishing with artificial flies, this stage of aquatic insects is the basis for an entire series of representative patterns for trout. [7] They account for over half of the fishing fly patterns regularly used in the United States.