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Diptera.info :: Identification queries :: Diptera (adults)
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free fall ... Acrocera orbiculus
jorgemotalmeida
#1 Print Post
Posted on 19-07-2009 23:27
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Location: Viseu - PORTUGAL
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Hi


I have spot this morning in Serra da Estrela the amazing and fantastic Acrocera sp. (maybe an A. sanguinea? ). It was so unusual to spot over 10 acrocerids separated from each other in a radius of about 500 m. I have never found per day MORE than 3 acrocerids, but today I saw 12!!! Some acrocerids attached to my t-shirt and others to my arm. Curious that these flies tried to approach my eyes... it is an unusual behaviour that we can find in Phortica (as it feeds on tear's eyes.)

Enjoy.. the fly Smile .

farm3.static.flickr.com/2513/3735932287_1c4ae6b4bd_b.jpg
Edited by jorgemotalmeida on 26-07-2009 18:41
 
http://www.flickr.com/photos/superegnum
jorgemotalmeida
#2 Print Post
Posted on 19-07-2009 23:35
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and here more one photo.


farm4.static.flickr.com/3495/3735949231_5fd7a170bb_b.jpg


to see it better... go to my flickr Wink
Edited by jorgemotalmeida on 19-07-2009 23:36
 
http://www.flickr.com/photos/superegnum
Nosferatumyia
#3 Print Post
Posted on 19-07-2009 23:36
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I had same experience in Middle Asia. They were swarming around my head when I was sitting on the edge of a gorge, an I took the by bare hands and put in a killing jar...
Val
 
jorgemotalmeida
#4 Print Post
Posted on 19-07-2009 23:45
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Grin yes. And put my feet back... and catch one by one... with this approach. Smile
They were separated within some meters...

I never expected to see them in a very open land!! Frown And it was windy. A soft wind, though.

I will show photos of the habitat soon. Wink
Edited by jorgemotalmeida on 19-07-2009 23:48
 
http://www.flickr.com/photos/superegnum
jorgemotalmeida
#5 Print Post
Posted on 19-07-2009 23:58
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what is odd (?) is the absence of any proboscis..
 
http://www.flickr.com/photos/superegnum
pwalter
#6 Print Post
Posted on 20-07-2009 11:32
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Hi, congratulations on the photos, what is the size of the fly?
 
jorgemotalmeida
#7 Print Post
Posted on 20-07-2009 11:38
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pwalter wrote:
Hi, congratulations on the photos, what is the size of the fly?


Thanks. Smile
Very small. It has 3 mm. I have others with 4 mm - 5 mm. But this specimen on the photos has 3 mm
 
http://www.flickr.com/photos/superegnum
Rui Andrade
#8 Print Post
Posted on 20-07-2009 19:39
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WOW, you are a very lucky guySmile.
 
www.flickr.com/photos/rui_andrade/
jorgemotalmeida
#9 Print Post
Posted on 21-07-2009 00:28
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You are even more, Andrade. You spotted an alive Astomella hispaniae! And you'll have a new .... soon.. Wink
Edited by jorgemotalmeida on 21-07-2009 00:30
 
http://www.flickr.com/photos/superegnum
jorgemotalmeida
#10 Print Post
Posted on 21-07-2009 01:42
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this is the place where I spottted Acrocera. Also we can find there Baumhaeuria (rare), Chaetogena, Bombylius discolor, and some cows. awkward lol

the photo is not mine. It was in google images. It is a small one. Just to show the habitat place. Wink
jorgemotalmeida attached the following image:


[147.13Kb]
Edited by ChrisR on 22-07-2009 09:53
 
http://www.flickr.com/photos/superegnum
Andre
#11 Print Post
Posted on 21-07-2009 09:26
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It is known behaviour of Acroceridae... And indeed it is still unknown what they feed on, if ever! Also to find the hosts is still intruiging. Good that you collected some.
Maybe Theo Zeegers can be of any help for ID?
 
www.biomongol.org
jorgemotalmeida
#12 Print Post
Posted on 21-07-2009 10:50
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Andr I will rear some lycosid spiders. Let's go see if I can get some acrocerids. But it is a hard task! Is there any possibility that they can parasite beetles? (that place has a huge number of coleopterans!)
In that zone there is Lycosa fasciiventris, Alopecosa simoni (extremely beautiful spider!), Aelurillus v-insignitus, Thanatus lineatipes... and so on. Wink
 
http://www.flickr.com/photos/superegnum
Zeegers
#13 Print Post
Posted on 21-07-2009 20:43
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Yes, looks like A. sanguinea, which is synonym of trigramma (one is male, other female).

sanguinea is the valid name.


Theo
 
jorgemotalmeida
#14 Print Post
Posted on 21-07-2009 22:26
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Thanks, Theo.
A pity that Isidro's photos are not available. He photographed an Acrocera sanguinea last year. It seems that there is a considerable variability among Acrocera sanguinea.
 
http://www.flickr.com/photos/superegnum
paqui
#15 Print Post
Posted on 21-07-2009 22:44
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Its thoraxs stripes were a fuzz for me before knowing they had "become" the same species. Pictures and keys at Faune de France pointed "undoubtfully" to A. trigramma Frown
Congratulations, Jorge, your pics are very good (not just thes 2) Smile
 
jorgemotalmeida
#16 Print Post
Posted on 21-07-2009 23:33
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Thanks, paqui. I will upload some new photos tomorrow to show the dorsal view. Smile
 
http://www.flickr.com/photos/superegnum
ChrisR
#17 Print Post
Posted on 22-07-2009 09:57
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It looks like amazing habitat - great for hill-topping flies Smile Before you leave just remember to check your pooter and your tubes to make sure that you don't bring back any cows! Wink
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London.
 
http://tachinidae.org.uk
jorgemotalmeida
#18 Print Post
Posted on 24-07-2009 20:49
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here are the photos otaken by Isidro Martinez in Zaragoza - Spain. It seems that Acrocera sanguinea can have a high variability in the scutum and in the abdomen. So here the photos to compare with mine.
jorgemotalmeida attached the following image:


[50.15Kb]
Edited by jorgemotalmeida on 24-07-2009 21:01
 
http://www.flickr.com/photos/superegnum
jorgemotalmeida
#19 Print Post
Posted on 24-07-2009 20:49
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another from Isidro (who kindly granted to me the photos)
jorgemotalmeida attached the following image:


[40.48Kb]
 
http://www.flickr.com/photos/superegnum
jorgemotalmeida
#20 Print Post
Posted on 24-07-2009 20:50
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another from Isidro
jorgemotalmeida attached the following image:


[54.02Kb]
 
http://www.flickr.com/photos/superegnum
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