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Species Syritta pipiens

Is this Syritta? - Syritta pipiens - male New Fly at the Yellow Blossoms - Syritta pipiens Syrphidae - Syritta pipiens - female thick-legged hover fly - Syritta pipiens - female Syritta pipiens? - Syritta pipiens Small Syrphid with thick femur - Syritta pipiens - male fatlegged hover - Syritta pipiens 4569A Small Naked Fly - Syritta pipiens
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Family Syrphidae (Hover Flies)
Subfamily Eristalinae
Tribe Milesiini
Subtribe Tropidiina
Genus Syritta
Species pipiens (Syritta pipiens)
Other Common Names
Thick-legged hoverfly
Explanation of Names
Syritta pipiens (Linnaeus 1758)
Size
6.5-9.5 mm(1)
Identification
Apical third of metafemur in both sexes with a row of spines along the ventral edge (photo); another good field mark is the pair of pale wedge-shaped spots on anterior margin of thorax behind the head.
Male: metafemur strongly thickened, but hardly bent, basally without protuberance; tergite 2-3 with small, pale spots. Female: Ocellar triangle black or bluish, metallic shining; thoracic dorsum dusted along side margin; tergite 4: side and hind margins not dusted. [Mark van Veen]
[From comment here: Syritta pipiens has two small white spots on the thorax directly behind head. And the hind tibia almost always has a red mark...and usually the hind femora too. Also the hind metatarsus is stubby and swollen.]
Range
Across NA & Eurasia(2)
Habitat
Larvae in wet decaying organic matter (manure, compost, silage)(1).
Stages of Syritta pipiens have been reported from cow and horse manure, from guinea pig manure and from human excrement. It has also been found in decayed and rotting tulip bulbs and in heaps of vegetable refuse (Hodson, 1931).
Season
mid-Apr to mid-Oct in ON(1)
Food
Larvae feed on decaying Narcissus bulbs; wet manure, compost and silage.
Remarks
Introduced from Europe in the 1800s (Martin Hauser's comment).
Internet References