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 Probably common
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| Andre Jas |
Posted on 17-08-2005 14:55
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 Member Location: Georgsdorf, Germany Posts: 485 Joined: 04.10.04 |
This is probably common, but I can't find it on the net. Anyone? Thanks, Andr?   |
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| Mark van Veen |
Posted on 17-08-2005 16:08
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 Member Location: Zeist, Netherlands Posts: 145 Joined: 12.05.04 |
Eristalis tenax |
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| Andre Jas |
Posted on 19-08-2005 14:42
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Member Location: Georgsdorf, Germany Posts: 485 Joined: 04.10.04 |
Can you explain to me why there are no horizontal white stripes on the body of my videograbs? Female, juv..? Andr |
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| Paul Beuk |
Posted on 19-08-2005 15:54
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
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 - - - - Paul Beuk on https://diptera.info |
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| Andre |
Posted on 03-10-2005 12:36
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 Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
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 |
Posted on 24-10-2005 09:58
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Member Location: Georgsdorf, Germany Posts: 485 Joined: 04.10.04 |
Thank you all. Andr |
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| Andre |
Posted on 24-10-2005 14:21
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Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
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...  |
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| Gisela Merkel-Wallner |
Posted on 24-10-2005 16:38
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Member Location: Germany, Bavaria, Oberpfalz Posts: 47 Joined: 05.07.05 |
In my region, the bavarian forest and eastern northbavaria, such dark spezimen of E. tenax are quite normal. I see them very often. Gisela |
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| Andre |
Posted on 06-11-2005 16:35
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Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
They are very common everywhere, jawohl  |
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