What are these - quiz

Images taken in a controlled environment or with a posed subject. All subject types.

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NikonUser
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Location: southern New Brunswick, Canada

What are these - quiz

Post by NikonUser »

Essentially square in cross-section with a nice a taper lengthwise
Image
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

rjlittlefield
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Post by rjlittlefield »

I too have photographed these. They're fascinating, uh, things... :wink:

--Rik

khw
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Location: NW Washington State

Post by khw »

aquatic, of interest to fly fishermen

NikonUser
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Location: southern New Brunswick, Canada

Post by NikonUser »

Also of interest to fish.
Opening, also come in a round cross-section.
Image
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

lauriek
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Joined: Sun Nov 25, 2007 6:57 am
Location: South East UK
Contact:

Post by lauriek »

I assume Caddis fly larvae homes? I've never seen one in the flesh as it were

NikonUser
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Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Yes.
Nothing exciting photographically. I am amazed and fascinated by the fact that invertebrates can build structures.
In this case the larva has to select a piece of plant material of the correct thickness - maybe not too difficult.
It then has to 'manufacture' 4 pieces of the same length and width to add to the existing case. It looks like the 4 walls of each new extension are not always of the same piece of material.
As it extends the case each new layer has to be just a little bit longer, on each of the 4 sides, than the previous layer.
The case ends up of being constructed of what looks like 100's of individual pieces.
Unbelievable!
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

rjlittlefield
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Posts: 21207
Joined: Tue Aug 01, 2006 8:34 am
Location: Richland, Washington State, USA
Contact:

Post by rjlittlefield »

Yes, very fascinating!

Here are some similar structures in the field, with considerable discussion by readers: http://www.photomacrography.net/forum/v ... php?t=5838

--Rik

NikonUser
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Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Great shots Rik and some good discussion by some talented readers! I had forgotten your post - it was 6 years ago.
'My' cases are similar to yours, they came from a local fast-flowing gravel-bottomed stream on October 15 2014.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

lauriek
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Joined: Sun Nov 25, 2007 6:57 am
Location: South East UK
Contact:

Post by lauriek »

Reminded me of this story I read a while back;

http://www.cabinetmagazine.org/issues/25/duprat.php

ChrisR
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Post by ChrisR »

I've only ever seen them with random pieces of stick, and stones. And in one case, small snails cemented into the walls. Some had live snails living in them long after the caddis had gone.

rjlittlefield
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Post by rjlittlefield »

NikonUser wrote:Great shots Rik and some good discussion by some talented readers! I had forgotten your post - it was 6 years ago.
Thanks. They say that time flies when you're having fun. I must have been having lots of fun, because it's hard to realize that was 6 years ago.

September 2008 it was, on a road trip that marked the end of my life doing contract R&D. On return, I started writing Zerene Stacker. Old dog, new bone...

--Rik

abpho
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Post by abpho »

Douglas Adams had it wrong when he said humans were the third most intelligent species on the planet.

PS: Thanks for sharing these wonderful images NU.
I'm in Canada! Isn't that weird?

GemBro
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Post by GemBro »

Wow ... I would not have got that in a million years ... great shots and information ...

Gem
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