[Syrphidae] Re: Sex identification based on abdomen coloration
steven at sfalk.wanadoo.co.uk
Wed Feb 10 11:22:07 GMT 2016
Females of both these species are generally darker,but there is considerable
variation in both sexes and all-dark specimens exist in both sexes. But the
shape and width of frons is most reliable, and in arbustorum, even a pale
female looks very different to a plane male i.e. the patterns are different.
But just using 'brightness' alone is not relaibale. For more info, see my
You also need to account for the other Ersitalis species that fly alongside
tenax and arbustorum.
Steven Falk BSc ARCS FRES
mobile: 0781 555 7263
Help Our Bees: http://www.stevenfalk.co.uk/help-our-bees
Flickr Image library at:
LinkedIn profile: https://www.linkedin.com/in/steven-falk-aa8ba817
From: syrphidae-bounces at lists.nottingham.ac.uk
[mailto:syrphidae-bounces at lists.nottingham.ac.uk] On Behalf Of Malin
Sent: 10 February 2016 08:16
To: syrphidae at lists.nottingham.ac.uk
Subject: [Syrphidae] Sex identification based on abdomen coloration
During this years field season I have started to consider whether the
coloration of the abdomen can help in sex identification, particularity of
Eristalis tenax and Eristalis arbustorum. My feeling is that the most
brightly coloured individuals appear to be male, whereas the individuals
with darker colours could be either male or female. Have anyone noted
something similar or do you have another way to quickly determine sex in the
field (except for the difference in eye morphology, which even though useful
can be a bit tricky in some field situations)?
This message and any attachment are intended solely for the addressee
and may contain confidential information. If you have received this
message in error, please send it back to me, and immediately delete it.
Please do not use, copy or disclose the information contained in this
message or in any attachment. Any views or opinions expressed by the
author of this email do not necessarily reflect the views of the
University of Nottingham.
This message has been checked for viruses but the contents of an
attachment may still contain software viruses which could damage your
computer system, you are advised to perform your own checks. Email
communications with the University of Nottingham may be monitored as
permitted by UK legislation.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Syrphidae