Biology:Syrphus torvus
| Syrphus torvus | |
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| male | |
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| macro image | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Syrphidae |
| Subfamily: | Syrphinae |
| Tribe: | Syrphini |
| Genus: | Syrphus |
| Species: | S. torvus
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| Binomial name | |
| Syrphus torvus Osten Sacken, 1875
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Syrphus torvus, the Hairy-eyed Flower Fly, is a common species of hoverfly found in the Holarctic. The adults feed on pollen and nectar, but the larvae feed on aphids.
Description
External images. For terminology see Speight key to genera and glossary.
Eyes have numerous hairs, in male, long and dense, in female shorter. Femora 3 is black on basal 3/4. The male genitalia and the larva are illustrated by Dusek and Laska (1964).[1]
See references for determination.[2][3][4][5]
Distribution
Palearctic: Greenland and Fennoscandia southward to Iberia and the Mediterranean basin through Europe into Turkey and European Russia. Also from Urals eastward to Siberia and the Russian Far East to the Pacific coast (Kuril Isles) and Japan. Indomalaya Formosa, Northern India, Nepal, and Thailand.
Nearctic: from Alaska southward to New Mexico.[6][7][8] Migratory. Large numbers of hoverflies of this species and of Metasyrphus sp. have been observed on Mount McKinley (Denali) in the Rocky Mountains at altitudes of 5,000 metres (16,000 ft) at the head of the Kahiltna Glacier.[9]
Biology
Habitat: Abies, Picea and Pinus forest and Betula, Fagus, Quercus forest and dwarf-shrub tundra. It is synanthropic in suburban gardens with mature trees and in urban parks.[10] Flowers visited include umbellifers, Allium ursinum, Aster, Bellis perennis, Brassica rapa, Buxus, Caltha, Cirsium arvense, Crataegus, Euphorbia, Frangula alnus, Glaux maritima, Hedera, Hieracium, Oxalis, Prunus spinosa, Ranunculus, Rosa, Rubus, Salix, Senecio jacobaea, Sorbus, Taraxacum, Tussilago.[11] It flies March to October. The larva feeds on aphids on trees, bushes and shrubs. Adults feed on pollen and nectar and are particularly attracted to yellow and white flowers. The insect overwinters as larvae.[12]
References
- ↑ Dusek, J. & Laska, P. (1964). "A contribution to distinguishing the European species of the subgenus Syrphus Fab. (Diptera, Syrphidae) according to the male genitalia and larvae". Acta Soc. Ent. Cechoslov. 61(1): 58-69.
- ↑ Van Veen, M. (2004). Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.addendum.
- ↑ Van der Goot, V.S. (1981). De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no. 32: 275pp. Amsterdam.
- ↑ Bei-Bienko, G.Y. & Steyskal, G.C. (1988). Keys to the Insects of the European Part of the USSR, Volume V: Diptera and Siphonaptera, Part I. Amerind Publishing Co., New Delhi. ISBN:81-205-0080-6.
- ↑ Coe, R.L. (1953). "Diptera: Syrphidae". Handbks. Ident. Br. Insects 10(1): 1-98. R. Ent. Soc. London. pdf.
- ↑ Fauna Europaea.
- ↑ Peck, L.V. (1988). "Syrphidae". In: Soos, A. & Papp, L. (eds.). Catalogue of Palaearctic Diptera 8: 11-230. Akad. Kiado, Budapest.
- ↑ Vockeroth, J.R. (1992). The Flower Flies of the Subfamily Syrphinae of Canada, Alaska, and Greenland (Diptera: Syrphidae). Part 18. The Insects and Arachnids of Canada. Ottawa, Ontario: Canadian Government Pub Centre. pp. 1–456. ISBN 0-660-13830-1.
- ↑ Edwards, J. S. (1987). "Arthropods of Alpine Aeolian Ecosystems". Annual Review of Entomology 32: 163–179. doi:10.1146/annurev.en.32.010187.001115.
- ↑ Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)". Syrph the Net, the Database of European Syrphidae 65: 285pp. http://www.diptera.info/downloads/StN_Species_Accounts_Glasgow_2011.pdf.
- ↑ de Buck, N. (1990). "Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België". Doc. Trav. IRSNB, no. 60, 1–167.
- ↑ "Hoverflies (Syrphidae)". The Garden Safari. http://www.gardensafari.net/english/hoverflies.htm.
Wikidata ☰ Q2746462 entry
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