susie acott's picture

Hoverfly on a Dog Rose

Observed: 4th June 2011 By: susie acott
S159 Neighbourhood Nature - course complete
susie acott’s reputation in Invertebratessusie acott’s reputation in Invertebrates
Hoverfly on a Dog Rose
Description:

Several were seen in this hedgerow particularly on the Cow Parsley and dog Rose.

Identifications
Species interactions

No interactions present.

Comments

ophrys's picture

Helophilus

This looks to be a female, as the eyes seem to be diverging at the top of the head, rather than parallel. Without a decent view of the hind tibia, it is difficult to rule out H. hybridus, from this photo. You are probably right, though...

Ian
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susie acott's picture

comments

Many thanks for your expertise on many of my observations. As I am new to this subject you provide very helpful information. However I couldn't understand your comments on my Scorpion fly.
Thank you once again.

Susie

ophrys's picture

Scorpion fly

If that was the one on a thistle, then the point was that you can only identify these from a picture from above. Your picture was from the side.

Scorpion flies can only be identified if they are a male, with a 'sting'. Males hold their genital capsule up, forward, above their body. That exposes the ventral side, which happens to hold the differentiating signs.

[Females cannot de done without dissection]

A good place to check this out is...

http://thetopshamnaturalist.blogspot.com/search/label/scorpion%20fly

The Topsham Naturalist...an interesting site, which hopefully will be picked up again soon.

Ian
_________________

My Flickr photos...

http://www.flickr.com/photos/52163027@N02/

susie acott's picture

scorpian fly

Many thanks, a much kinder reply from you and I will look on the website you suggested and study the information you provided. Nice to have a mentor at my amateur stage!!