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True flies are insects of the order Diptera. The name is derived from the Greek di-= two, and ptera = wings. Most insects of this order have two wings (not counting the halteres, club-like limbs which are homologous to the second pair of wings found on insects of other orders). Wingless flies are found on some islands and other isolated places.
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2843 least concern insect species. [1] 47% of all evaluated insect species are listed as least concern. The IUCN also lists 12 insect subspecies as least concern. No subpopulations of insects have been evaluated by the IUCN.
There are two basic aerodynamic models of insect flight. Most insects use a method that creates a spiralling leading edge vortex. [19] [20] Some very small insects use the fling-and-clap or Weis-Fogh mechanism in which the wings clap together above the insect's body and then fling apart. As they fling open, the air gets sucked in and creates a ...
Insects are the only group of invertebrates that have evolved wings and flight. Insects first flew in the Carboniferous, some 300 to 350 million years ago, making them the first animals to evolve flight. Wings may have evolved from appendages on the sides of existing limbs, which already had nerves, joints, and muscles used for other purposes.
These genetic mutations may have different results such as the development of muscles that cannot support flight or even result in the lack of wings entirely. [2] Flightless fly models have been especially useful for the study of human neuromuscular diseases such as spinal muscular atrophy , spinobulbar muscular atrophy , myotonic dystrophy ...
'winged') is a subclass of insects that includes all winged insects and groups who lost them secondarily. [3] Pterygota group comprises 99.9% of all insects. [4] The orders not included are the Archaeognatha (jumping bristletails) and the Zygentoma (silverfishes and firebrats), two primitively wingless insect orders. Unlike Archaeognatha and ...
This list may not reflect recent changes. A. African mantis; List of stick insects and mantids of Australia; C. ... List of data deficient insects; List of ...
Insect species (IUCN, 2016.1) 5993 extant species have been evaluated; 4291 of those are fully assessed [a] 3144 are not threatened at present [b] 1146 to 2848 are threatened [c] 59 to 105 are extinct or extinct in the wild: 58 extinct (EX) species [d] 1 extinct in the wild (EW) 46 possibly extinct [CR(PE)] 0 possibly extinct in the wild [CR(PEW)]