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Platycheirus rosarum is a species of hoverfly found in the Holarctic realm.Like its close relative Platycheirus granditarsus, it can be found in marshy meadows and ditches; indeed, the two species can often be found together.
Most female horse flies feed on mammal blood, but some species are known to feed on birds, amphibians or reptiles. Other bloodfeeding Diptera are Ceratopogonidae Phlebotominae Hippoboscidae, Hydrotaea and Philornis downsi (Muscidae), Spaniopsis and Symphoromyia Rhagionidae. There are no known acalyptrates that are obligate blood-feeders.
Adults are small (< 2 millimetres (5 ⁄ 64 in)) to medium-sized insects (- < 10 millimetres (25 ⁄ 64 in)). Larger Diptera are rare, only certain families of Diptera Mydidae and Pantophthalmidae reach 95–100 millimetres (3 + 3 ⁄ 4 –4 in) wingspan while tropical species of Tipulidae have been recorded at over 100 millimetres (4 in).
External images For terms see Morphology of Diptera Wing length 7·5-8·5 mm. Male: postocular orbit less than 0.5 of its maximal width near vertex. Female: frons with white dust spots, the undusted area extending as a black Y- shape into the yellow part. Tergite 5 with yellow side margin.
For terms see Morphology of Diptera. Platypezidae are minute to medium sized (1.5–6 mm) slender or robust flies. The male and female usually differ in colour. Males in particular are often all black, one or both sexes may be in part or all grey or yellow. Markings may be orange, grey or silver. The abdomen may have two colours.
For terms see Morphology of Diptera and Tephritidae glossary. Tephritidae morphology. Tephritids are small to medium-sized (2.5–10 mm) flies that are often colourful, and usually with pictured wings, the subcostal vein curving forward at a right angle.
The Schizophora are a section of true flies containing 78 families, which are collectively referred to as muscoids, although technically the term "muscoid" should be limited to flies in the superfamily Muscoidea; this is an example of informal, historical usage persisting in the vernacular.
Though the evolution of exaggerated male traits as a result of female mate choice was at one point controversial, the Diopsidae are now regarded as a classic example of animals that exhibit sexually selected traits. [8] [20] [21] One view maintains that male ornaments co-evolve with female preferences. The selection of an ornamented mate causes ...