Two-band wasp hover fly
| Two-band wasp hover fly | ||||||||||||
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Two-band wasp hover fly ( Chrysotoxum bicinctum ) |
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| Scientific name | ||||||||||||
| Chrysotoxum bicinctum | ||||||||||||
| ( Linnaeus , 1758) |
The chrysotoxum bicinctum ( Chrysotoxum bicinctum ) is a kind from the family of hoverflies (Syrphidae).
features
The species reaches a body length of 10 to 12 millimeters. Her black abdomen has two characteristic yellow bands; one wide on the second and one narrow on the fourth segment. The third abdominal segment is black, which distinguishes it from the other species of the genus Chrysotoxum , which have yellow bands of approximately the same width on all three segments. Occasionally, however, a fine, two-part attachment of a yellow band can be seen on the upper side of the third abdominal segment of C. bicinctum . A very fine, two-part yellow band is also found on the fifth abdominal segment. The mesonotum is black and has two more or less weakly recognizable light gray longitudinal stripes in the middle. On the side of the mesonotum there is a yellow side line, interrupted roughly in the middle. The scutellum is colored matt black. The face is yellow and marked with a black central welt, the first two links of the black antennae are together longer than the third. The wings are transparent except for a large dark brown spot on the front edge near the tip. The femora (thighs) of the front and middle pairs of legs are basally black, 80 percent of those of the hind legs. The remaining limbs of the legs are colored yellow.
Similar species
The two-band wasp hover fly can easily be confused with the broadband forest hover fly ( Dasyrphus tricinctus ), but they are mainly distinguished by their shorter antennae, the narrow dark spot on the wings, the lack of yellow lateral lines on the mesothorax and the yellow band on the third abdominal segment can be.
Occurrence and habitat
The species occurs in the entire Holarctic . They can be found on the edges of forests, river banks, clearings and on meadows. They are not common, but they are common, such as in urban areas. Your flight time is from May to September with a peak in July.
Way of life
The adults are fast fliers. Males usually hover at a height of two to three meters and sit down to rest on the ground vegetation. The flies feed on nectar. They are mainly found on umbellate flowers, often on parsnips and beavers . The larvae live in the ground, mostly near anthills, and feed on zoophagus , including aphids that suckle on roots.
literature
- Olaf Bastian: Hoverflies. (= The New Brehm Library. Vol. 576). Westarp Sciences, Magdeburg 1994, ISBN 3-89432-469-4 .
- Gerald Bothe: Hoverflies. German Youth Association for Nature Observation, Hamburg 1996, ISBN 3-923376-07-3 .
- Joachim and Hiroko Haupt: Flies and mosquitoes: observation, way of life. Naturbuch-Verlag, Augsburg 1998, ISBN 3-89440-278-4 .
- Kurt Kormann: Hover flies and bubble-head flies of Central Europe. (= Fauna nature guide. Volume 1). Fauna-Verlag, Nottuln 2002, ISBN 3-935980-29-9 .
- MCD Speight, E. Castella, J.-P. Sarthou, C. Monteil (Ed.): Syrph the Net on CD, Issue 7. The database of European Syrphidae. Syrph the Net Publications, Dublin. ISSN 1393-4546
- MP van Veen: Hoverflies of Northwest Europe. KNNV Publishing, 2004, ISBN 90-5011-199-8 .
- M. Reemer, Willem Renema, Wouter van Steenis, Theo Zeegers, Aat Barendregt, John T. Smit, Mark P. van Veen, Jeroen van Steenis, Laurens JJM van der Leij: De Nederlandse zweefviegen . (= Nederlandse Fauna. 8). EIS Nederland & Naturalis, 2009, ISBN 978-90-5011-290-1 .
