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Holocephala - a tiny robber fly
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Aug 20, 2015 12:54:54   #
gym Loc: Athens, Georgia
 
On a trip to Virginia last week, I looked for - and found - a population of Holocephala. These tiny robber flies - about 10mm long - sit on or near the tips of dead twigs, occasionally darting outward to catch an even smaller fly, then they return to the twig to feast.


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Aug 20, 2015 13:10:27   #
Nikonian72 Loc: Chico CA
 
Awesome study! :thumbup:

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Aug 20, 2015 13:12:01   #
gym Loc: Athens, Georgia
 
Nikonian72 wrote:
Awesome study! :thumbup:


Thanks Douglass.

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Aug 20, 2015 13:26:47   #
LoneRangeFinder Loc: Left field
 
:thumbup:

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Aug 20, 2015 14:56:27   #
EnglishBrenda Loc: Kent, England
 
Really good quality and interesting shots.

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Aug 20, 2015 16:20:49   #
gym Loc: Athens, Georgia
 
EnglishBrenda wrote:
Really good quality and interesting shots.
Thank you so much, Brenda.

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Aug 20, 2015 22:43:34   #
napabob Loc: Napa CA
 
Nikonian72 wrote:
Awesome study! :thumbup:
what he said.

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Aug 21, 2015 05:02:00   #
martinfisherphoto Loc: Lake Placid Florida
 
Bugged-eyed robber, sweet!

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Aug 21, 2015 05:53:24   #
RWCRNC Loc: Pennsylvania
 
Excellent!

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Aug 21, 2015 06:53:55   #
waltchilds Loc: Central Florida
 
Very nice shots, but what is a population of Holocephala???

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Aug 21, 2015 07:51:26   #
gym Loc: Athens, Georgia
 
waltchilds wrote:
. . . what is a population of Holocephala???
NUMBER TWO
pop·u·la·tion (pŏp′yə-lā′shən)
n.
1.a. All of the people inhabiting a specified area.
b. The total number of such people.
2. The total number of inhabitants constituting a particular race, class, or group in a specified area
3. The act or process of furnishing with inhabitants.
4. Ecology All the organisms that constitute a specific group or occur in a specified habitat.
5. Statistics The set of individuals, items, or data from which a statistical sample is taken. Also called universe.

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Aug 21, 2015 08:23:10   #
Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga
 
Great captures... :thumbup: :thumbup: :thumbup: ... Now I know the Genus name of them. I see them in my yard in Late Spring/early Summer & have wondered what species they were (I'm assuming these are the same species although mine were hairier). They like to perch on the ends of small branches/twigs...I managed to get images of them mating this year... The link goes to a Flickr image. They were on a tomato cage wire here. One of those cages with pretty thin wires (a cheapo cage)
http://www.flickr.com/photos/screaminscott/17859065482/in/album-72157646665813107/

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Aug 21, 2015 08:24:34   #
waltchilds Loc: Central Florida
 
gym wrote:
The total number of inhabitants constituting a particular race, class, or group in a specified area
Thanks for the additional information. If I understand this correctly, when you said "I looked for - and found - a population of Holocephala" you looked for and found a population of Robber Flies in this specific area. Is that correct?

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Aug 21, 2015 10:45:45   #
gym Loc: Athens, Georgia
 
waltchilds wrote:
Is that correct?
I looked for - and found - a population of a specific KIND of robber flies - yes. I have photographed them there in previous years and because the habitat has not changed appreciably, I expected them to be there again at the same time this year.

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Aug 21, 2015 10:53:58   #
gym Loc: Athens, Georgia
 
Screamin Scott wrote:
Great captures... :thumbup: :thumbup: :thumbup: ... Now I know the Genus name of them. I see them in my yard in Late Spring/early Summer & have wondered what species they were (I'm assuming these are the same species although mine were hairier). They like to perch on the ends of small branches/twigs...I managed to get images of them mating this year... The link goes to a Flickr image. They were on a tomato cage wire here. One of those cages with pretty thin wires (a cheapo cage) http://www.flickr.com/photos/screaminscott/17859065482/in/album-72157646665813107
Great captures... :thumbup: :thumbup: :thumbup: ... (show quote)
Thanks Scott. Yours are very nice photos. However they are not the same species as the one pictured here.

You might want to submit them to BugGuide.net. How big are they? The ones above are usually a fraction less than 10 mm. They do occur in Georgia because I have photographed them in Greensboro, Georgia in late July and August.

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