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Diptera.info » Family forums » Syrphidae
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Probably common
Andre Jas
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
Eristalis tenax
 
http://home.hccnet.nl/mp.van.veen/
Andre Jas
Can you explain to me why there are no horizontal white stripes on the body of my videograbs? Female, juv..?

Andr
 
Paul Beuk
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
 
diptera.info
Andre
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.
 
www.biomongol.org
Andre Jas
Thank you all.

Andr
 
Andre
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
 
www.biomongol.org
Gisela Merkel-Wallner
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
They are very common everywhere, jawohl Smile
 
www.biomongol.org
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17.08.23 15:23
Aneomochtherus

17.08.23 13:54
Tony, I HAD a blank in the file name. Sorry!

17.08.23 13:44
Tony, thanks! I tried it (see "Cylindromyia" Wink but don't see the image in the post.

17.08.23 11:37
pjt - just send the post and attached image. Do not preview thread, as this will lose the link to the image,

16.08.23 08:37
Tried to attach an image to a forum post. jpg, 32kB, 72dpi, no blanks, ... File name is correctly displayed, but when I click "Preview Thread" it just vanishes. Help!

23.02.23 21:29
Has anyone used the Leica DM500, any comments.

27.12.22 21:10
Thanks, Jan Willem! Much appreciated. Grin

19.12.22 11:33
Thanks Paul for your work on keeping this forum available! Just made a donation via PayPal.

09.10.22 17:07
Yes, dipterologists from far abroad, please buy your copy at veldshop. Stamps will be expensive, but he, the book is unreasonably cheap Smile

07.10.22 11:55
Can any1 help out with a pdf copy of 1941 Hammer. Vidensk. Meddel. Dansk Naturhist. Foren. 105; thank you

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