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Diptera.info :: Family forums :: Syrphidae
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Probably common
Andre Jas
#1 Print Post
Posted on 17-08-2005 14:55
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Location: Georgsdorf, Germany
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This is probably common, but I can't find it on the net. Anyone?

Thanks,

Andr?
www.diptera.info/forim/7-0597-1.jpg
www.diptera.info/forim/7-0597-2.jpg
 
Mark van Veen
#2 Print Post
Posted on 17-08-2005 16:08
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Eristalis tenax
 
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Andre Jas
#3 Print Post
Posted on 19-08-2005 14:42
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Can you explain to me why there are no horizontal white stripes on the body of my videograbs? Female, juv..?

Andr
 
Paul Beuk
#4 Print Post
Posted on 19-08-2005 15:54
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Maybe melanistic. In some species, the very dark specimens often are intersexes (Scaeva, Melanostoma, Pyrophaena, Parasyrphus). I do not know if the same thing happens in Eristalis.
Paul

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Andre
#5 Print Post
Posted on 03-10-2005 12:36
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Well, this one is not melanistic. There is a shimmering red visible in the snapshot. This one can be a very fresh specimen, where colour has not fully formed yet. Also there seems to be a connection between bodycolour and temperature at emergence; the colder it was, the darker the specimen stays. In E. tenax the wide range between very red and very dark specimens is a normal phenomenon.
 
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Andre Jas
#6 Print Post
Posted on 24-10-2005 09:58
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Thank you all.

Andr
 
Andre
#7 Print Post
Posted on 24-10-2005 14:21
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Did you know that among some alligator-species (like Aligator sinensis) temperature determines whether only males, only females or both emerge from the nests?
May be interesting how this works among insectspecies... I guess.
Well, so far my sidestep... Cool
 
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Gisela Merkel-Wallner
#8 Print Post
Posted on 24-10-2005 16:38
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Location: Germany, Bavaria, Oberpfalz
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In my region, the bavarian forest and eastern northbavaria, such dark spezimen of E. tenax are quite normal. I see them very often.

Gisela
 
Andre
#9 Print Post
Posted on 06-11-2005 16:35
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They are very common everywhere, jawohl Smile
 
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