- published: 11 Mar 2016
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True flies are insects of the order Diptera (from the Greek di = two, and ptera = wings). They possess a pair of wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax. Apart from secondarily flightless insects (including some flies), the only other order of insects with any form of halteres are the Strepsiptera, and theirs are on the mesothorax, with the flight wings on the metathorax.
The presence of a single pair of patent, metathoracic flight wings distinguishes true flies from other insects with "fly" in their names, such as mayflies, dragonflies, damselflies, stoneflies, whiteflies, fireflies, alderflies, dobsonflies, snakeflies, sawflies, caddisflies, butterflies or scorpionflies. Some true flies have become secondarily wingless, especially in the superfamily Hippoboscoidea, or among those that are inquilines in social insect colonies.
Some authors draw a distinction in writing the common names of insects. True flies are written as two words, such as crane fly, robber fly, bee fly, moth fly, and fruit fly. In contrast, common names of nondipteran insects that have "fly" in their names are written as one word, e.g., butterfly, stonefly, dragonfly, scorpionfly, sawfly, caddisfly, whitefly. In practice, however, this is a comparatively new convention, and, especially in older books, one commonly might see the likes of "saw fly" and "caddis fly". In any case, non-entomologists cannot in general be expected to tell dipterans, "true flies", from other insects.
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The sun is shining, but I don't know if it'll shine again,
The sky is clear now, but the clouds wait overhead,
The wind stopped blowing, but I see the trees are flowing,
The water's calm now feel the undertow towing me down,
towing me down.
The sun's gone down now behind the dark clouds looming,
Birds stop singing, silence so soothing,
Dark clouds open up, I hold my rain-soaked head,
Thoughts are racing by, I scream and wish that I was dead,
I wish that I was dead.
Gotta find a way in this world to cope,
Gotta find a place in this world with hope.
Gotta find a way to keep my head straight another day
I pray to let go of hate I break myself away from my mind,