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 Hover-Hybomitra, 2015-07-15, N. Germany => Hybomitra distinguenda
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| Lennart Bendixen |
Posted on 17-01-2016 16:15
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Member Location: Northern Germany Posts: 1171 Joined: 19.12.14 |
Hi, though it surely cannot be identified to species level, it would be interesting if H. bimaculata group can be confirmed at least. It was hovering there at least for 4 minutes (almost without changing position), so I could only take pictures while flying (in fact only the fly did). Don't know what he was looking at (me?) or waiting for (me going away?). It was the first Hybomitra I could observe and maybe it's no unusual behaviour? Thanks in advance for any help. Lennart 2015-07-15, Northern Germany, S-H, Mohrkirch, fallow land, above a gravel path Lennart Bendixen attached the following image:  [155.92Kb] Edited by Lennart Bendixen on 17-01-2016 21:11 |
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| John Carr |
Posted on 17-01-2016 17:09
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 Member Location: Massachusetts, USA Posts: 9847 Joined: 22.10.10 |
Hovering is common behavior for male Hybomitra, or at least some common species in North America. Swarming or hovering behavior is driven by visual cues, some obvious to humans and others not. Some aquatic Chironomidae and Ceratopognidae look for a dark object on a white background (a rock on a beach, or an entomologist on a beach). Others swarm above the tallest tree, around a tree trunk, or beside a stream bank. I have seen one Hybomitra hovering next to a 30 cm oak sapling, and another about 1 meter altitude in the middle of a wide trail. I read that Canadian Chrysops look for forest edges. |
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| Zeegers |
Posted on 17-01-2016 18:53
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Member Location: Soest, NL Posts: 18531 Joined: 21.07.04 |
Hi Lennart, This is an excellent photo of a male H. distinguenda !! Not all European Hybomitra do hover, this behaviour is actually very specific. Distinguenda is known as an excellent hover, but for instance bimaculata has never been seen hovering.... Please submit for the gallery. Theo |
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| Lennart Bendixen |
Posted on 17-01-2016 21:11
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Member Location: Northern Germany Posts: 1171 Joined: 19.12.14 |
Fantastic!  I'll add the picture - many thanks for the determination, Theo. John, these are interesting observations - I wish I knew more literature about dipteran ecology and esp. such mentioned behaviours. |
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| Lennart Bendixen |
Posted on 17-01-2016 21:29
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Member Location: Northern Germany Posts: 1171 Joined: 19.12.14 |
well, I tried to submit the picture to the gallery, but as I chose Tabanidae I landed on the home page. What went wrong?
Edited by Lennart Bendixen on 18-01-2016 08:24 |
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| Zeegers |
Posted on 18-01-2016 12:39
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Member Location: Soest, NL Posts: 18531 Joined: 21.07.04 |
No idea Send Paul a PM. Theo |
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| Nikita Vikhrev |
Posted on 18-01-2016 12:55
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 Member Location: Moscow, Russia Posts: 9223 Joined: 24.05.05 |
I tried to submit the picture to the gallery, but as I chose Tabanidae I landed on the home page It is common, try once or twice again Nikita Vikhrev - Zool Museum of Moscow University |
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| Lennart Bendixen |
Posted on 18-01-2016 20:08
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Member Location: Northern Germany Posts: 1171 Joined: 19.12.14 |
well, I tried more than 10 times and nothing happened, but I've informed Paul now. |
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| Paul Beuk |
Posted on 19-01-2016 09:37
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 Super Administrator Location: Netherlands Posts: 19229 Joined: 11.05.04 |
Perhaps it was just too big? I have now added it using the admin tool (which circumvents any size limits). Cheers! Edited by Paul Beuk on 19-01-2016 09:37 Paul - - - - Paul Beuk on https://diptera.info |
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| Lennart Bendixen |
Posted on 19-01-2016 20:08
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Member Location: Northern Germany Posts: 1171 Joined: 19.12.14 |
Thank you, Paul! (size was 1000x664, 155 kb )
Edited by Lennart Bendixen on 19-01-2016 20:09 |
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but don't see the image in the post.