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Most insects have one pair of large, prominent compound eyes composed of units called ommatidia (ommatidium, singular), up to 30,000 in a single compound eye of, for example, large dragonflies. This type of eye gives less resolution than eyes found in vertebrates, but it gives an acute perception of movement and usually possesses UV- and green ...
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Living off the grid can mean different things to different people. For some, it can simply be the act of installing solar panels or actively working in other ways toward saving energy.
Caddisflies was the only group of these insects to use silk as part of their lifestyle, which has been a contributing factor to their success and why they are the most species-rich order of aquatic insects. [8] About 14,500 species of caddisfly in 45 families have been recognised worldwide, [9] but many more species remain to be described.
There is, for example, no objective basis for excluding the Psychodidae from the list, and some of them (or midge-like taxa commonly included in the family, such as Phlebotomus) are blood-sucking pests and disease vectors. Most midges, apart from the gall midges (Cecidomyiidae), are aquatic during the larval stage.
Grylloblattidae, commonly known as the icebugs or ice crawlers, is a family of extremophile (psychrophile) and wingless insects that live in the cold on top of mountains and the edges of glaciers. It is the only member of Grylloblattodea , which is generally considered an order .
An example of this is Spilomyia longicornis, which is a fly but mimics a vespid wasp. Head of a horse-fly showing large compound eyes and stout piercing mouthparts A head of a fly, showing the two compound eyes and three simple eyes clearly.
Many insects with "bug" in their common name, especially in American English, belong to other orders; for example, the lovebug is a fly [9] and the Maybug and ladybug are beetles. [10] The term is occasionally extended to colloquial names for freshwater or marine crustaceans (e.g. Balmain bug , Moreton Bay bug , mudbug ) and used by physicians ...