www.photomacrography.net :: View topic - A Water Bug - Identification Help Appreciated
www.photomacrography.net Forum Index
An online community dedicated to the practices of photomacrography, close-up and macro photography, and photomicrography.
Photomacrography Front Page Amateurmicrography Front Page
Old Forums/Galleries
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
A Water Bug - Identification Help Appreciated

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Technical and Studio Photography -- Macro and Close-up
View previous topic :: View next topic  
Author Message
Walter Piorkowski



Joined: 14 Aug 2006
Posts: 684
Location: South Beloit, Ill

PostPosted: Wed Sep 03, 2008 8:48 pm    Post subject: A Water Bug - Identification Help Appreciated Reply with quote







Images 1 through 3
35mm Canon Macro lens at f/8 to f/11, one 30mm tube
Horizontal F.O.V. 9.0 mm
Image 1 dual reflected and transmitted illumination
Images2 and 3 reflected illumination

Canon 10D
Photoshop processing


This photogenic little bug was found in my local pond. It hangs upside down just below the waters surface. I found unexpectedly that it likes to eat insect larvae when I added one to the watch glass it was in. It pounced upon it so fast the larvae was knocked clear out of my field of view.

Walt
Back to top
View user's profile Send private message
rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 20370
Location: Richland, Washington State, USA

PostPosted: Wed Sep 03, 2008 9:24 pm    Post subject: Reply with quote

Looks to me like a "Backswimmer", one of the true bugs, family Notonectidae.

They're aggressive little guys, liable to take a chomp out of you too.

I especially like images 2 and 3. Excellent capture of those fine filaments on the side of the abdomen. I have no idea what those do -- never noticed them before I saw these images, but now I see them in some of the BugGuide shots too.

--Rik
Back to top
View user's profile Send private message Visit poster's website
lauriek
Site Admin


Joined: 25 Nov 2007
Posts: 2404
Location: South East UK

PostPosted: Thu Sep 04, 2008 6:13 am    Post subject: Reply with quote

Over here we call these guys "Water boatmen", I think because it looks like they are paddling oars...
Back to top
View user's profile Send private message Visit poster's website
Harold Gough



Joined: 09 Mar 2008
Posts: 5787
Location: Reading, Berkshire, England

PostPosted: Thu Sep 04, 2008 6:38 am    Post subject: Reply with quote

The genus Corixa swims the other way up (back uppermost) and its, rear, swimming legs are not so elongated, being of similar length to the middle pair. The UK species is C. punctata, the Lesser Water Boatman.

Harold
_________________
My images are a medium for sharing some of my experiences: they are not me.
Back to top
View user's profile Send private message
P_T



Joined: 19 Jul 2008
Posts: 461
Location: Sydney, Australia

PostPosted: Thu Sep 04, 2008 6:54 am    Post subject: Reply with quote

Oh wow, that is a funky little fella there!! How big is it?
Back to top
View user's profile Send private message
Walter Piorkowski



Joined: 14 Aug 2006
Posts: 684
Location: South Beloit, Ill

PostPosted: Thu Sep 04, 2008 10:34 am    Post subject: Reply with quote

Thank you gentlemen for your help and knowledge. The term boatman does stir some old memoeries of that title being given to this subject. P_T, I try on most of my images to put a horizontal field of view or FOV size to help with this type of problem. To answer, maybe 7mm "leg tip to leg tip.
Walt
Back to top
View user's profile Send private message
NikonUser



Joined: 04 Sep 2008
Posts: 2577
Location: southern New Brunswick, Canada

PostPosted: Thu Sep 04, 2008 11:02 am    Post subject: Reply with quote

rjlittlefield wrote:
Excellent capture of those fine filaments on the side of the abdomen. I have no idea what those do -- never noticed them before I saw these images, but now I see them in some of the BugGuide shots too.

--Rik


I believe these are hydrofuge hairs and function to hold the bug on the surface while it takes in a bubble of air; all part of its physical gill and plastron respiration.
Back to top
View user's profile Send private message
Harold Gough



Joined: 09 Mar 2008
Posts: 5787
Location: Reading, Berkshire, England

PostPosted: Thu Sep 04, 2008 11:27 pm    Post subject: Reply with quote

Such long, fine filaments (setae or hairs), in aquatic arthropods generally have the function of supporting the insect on/under the surface film of the water by using the surface tension.

Harold
_________________
My images are a medium for sharing some of my experiences: they are not me.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Technical and Studio Photography -- Macro and Close-up All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group