[Syrphidae] Re: Re : Publication of the winter of hoverflies

pieter vantieghem pvtlvd at yahoo.com
Sun Jan 29 22:21:35 GMT 2012


In an extremely mild start of the winter in Belgium with almost no days with negative temperatures, I had 3 adult E. tenax freshly emerged from a wet manure storage at a farm on the 20th of december, 2 males and 1 female. An observation confirming the hypothesis of Wouter.


ys
Pieter Vantieghem



________________________________
 From: Wouter van Steenis <w.v.steenis at casema.nl>
To: Hoverfly discussion list <syrphidae at lists.nottingham.ac.uk> 
Sent: Sunday, January 29, 2012 11:02 PM
Subject: [Syrphidae] Re: Re :  Publication of the winter of hoverflies
 

Dear all,
 
considering overwintering Syrphidae, I’m getting more and more convinced 
that no European species has this overwintering as adult as only strategy. In my 
opinion it always are species that have many generations a year and more 
generations in warmer climates than in colder climates. All these species you 
might find on the wing in winter in the Mediterranean. In more temperate areas 
they will get less and less active with dropping temperatures. Both males and 
females will start sheltering somewhere in colder periods. As long as 
temperatures (or other circumstances?) are not to bad, most will survive. 
Eventually most will die, males much faster than females. At the end of winter 
only few will still survive, all of them females. Whether they have offspring or 
not I don’t know.
I remember that someone has written on this subject regarding Eupeodes 
corollae somewhere in Germany. It fits well with all species people listed: 
Scaeva selenitica, S. pyrastri, Eristalis tenax, Episyrphus balteatus. You will 
find males and females in late autumn, often much more females than males. And 
in spring you only find females, at least in the Netherlands. And these species 
are also the most abundant migrating species. Eristalinus aeneus also hibernates 
as adult in the Netherlands. It has several generations a year, but I am not 
sure whether E. aeneus migrates regularly.
 
Best wishes 
 
Wouter 
From: Pierre MILLE 
Sent: Friday, January 27, 2012 1:47 PM
To: Hoverfly discussion list 
Subject: [Syrphidae] Re : Publication of the winter of 
hoverflies
  Hello every one,
 
Let me ask you because I like to know if there is publication on the hoverflies that would be able to spend the winter as adults. 
 
Is it 
a rare or known ? Does research have been done about it ?
 
Best wishes
 
Pierre
 
Pierre MILLE 
3 avenue des buttes blanches
95220 Herblay - France
 
 

De  : Frank Van de Meutter  <Frank.VandeMeutter at bio.kuleuven.be>
>À : Hoverfly discussion list  <syrphidae at lists.nottingham.ac.uk> 
>Envoyé le : Vendredi 27 janvier 2012  8h55
>Objet : [Syrphidae] Re:  Re : Pipizella paper
>
>Hallo Jeroen,
>
>je zonnet.nl adres bounced (mailbox vol) dus dan maar ook via de maillijst. Hopelijk krijg  je dit wel toe?
>Voor mij ook een exemplaar. Heel leuk overigens dat je het 
  werk van Jan Lucas 
  afmaakt.
>
>
>groeten,
>
>Frank
>
>________________________________________
>Van: syrphidae-bounces at lists.nottingham.ac.uk [syrphidae-bounces at lists.nottingham.ac.uk]  namens ruud van der weele [rvanderweele at gmail.com]
>Verzonden: 
  donderdag 26 januari 2012 9:24
>Aan: Pierre MILLE; Hoverfly discussion 
  list
>Onderwerp: [Syrphidae] Re: Re : Pipizella paper
>
>Yes, and your 
  name is in Dutch "Piet"!
>
>I admit it is 
  childish!
>
>
>Ruud
>
>2012/1/26 Pierre MILLE <mille_pierre at yahoo.fr>:
>> 
  Hello Jeroen,
>>
>> In French, your name is Jerome 
  :)
>>
>> If you agree send me a copy of your article, I will receive 
  it by email.
>>
>> Best wishes
>>
>> 
  Pierre
>>
>>
>> Pierre MILLE
>> 3 avenue des buttes 
  blanches
>> 95220 Herblay - 
  France
>>
>>
>>
>>
>> De : Jeroen van Steenis <j.van.steenis at xmsnet.nl>
>> 
  À : syrphidae at lists.nottingham.ac.uk
>> 
  Envoyé le : Mercredi 25 janvier 2012 14h37
>> Objet : [Syrphidae] 
  Pipizella paper
>>
>> Dear All
>>
>> My paper "Steenis, J. 
  van and Lucas, J.A.W. 2011. Revision of the
>> West-Palaearctic species 
  of Pipizella Rondani, 1856 (Diptera, Syrphidae)
>> Dipterists Digest 2011 
  18, 127-180" is out.
>>
>> It is a large paper and takes about 4 Mb 
  in two separate PDF files. Anyone
>> interested can reply to me and I 
  will send it personally.
>>
>> Best wishes, 
  Jeroen.
>>
>>
>> 
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>
>
>
>--
>Ruud van der 
  Weele
>rvanderweele at gmail.com
>
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  mailing list
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