Thread subject: Diptera.info :: Probably common
Posted by Andre Jas on 17-08-2005 14:55
#1
This is probably common, but I can't find it on the net. Anyone?
Thanks,
Andr?
Posted by Mark van Veen on 17-08-2005 16:08
#2
Eristalis tenax
Posted by Andre Jas on 19-08-2005 14:42
#3
Can you explain to me why there are no horizontal white stripes on the body of my videograbs? Female, juv..?
Andr
Posted by Paul Beuk on 19-08-2005 15:54
#4
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.
Posted by Andre on 03-10-2005 12:36
#5
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.
Posted by Andre Jas on 24-10-2005 09:58
#6
Thank you all.
Andr
Posted by Andre on 24-10-2005 14:21
#7
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... B)
Posted by Gisela Merkel-Wallner on 24-10-2005 16:38
#8
In my region, the bavarian forest and eastern northbavaria, such dark spezimen of E. tenax are quite normal. I see them very often.
Gisela
Posted by Andre on 06-11-2005 16:35
#9
They are very common everywhere, jawohl :)