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°Caddisflies°°


°Caddisflies°°
Photo Information
Copyright: Sergio Stella (flashpoint) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 572 W: 113 N: 1964] (10317)
Genre: Animals
Medium: Color
Date Taken: 2009-10-25
Categories: Insects
Camera: Nikon D40X, AF Micro 105mm f2.8
Exposure: f/11, 1/100 seconds
More Photo Info: [view]
Photo Version: Original Version, Workshop
Date Submitted: 2009-10-27 5:37
Viewed: 158
Points: 22
[Note Guidelines] Photographer's Note

Trichoptera (Greek: trich, "hair" + ptera, "wings") is an order of insects. Member species, known as caddisflies, sedge-flies or rail flies, are small moth-like insects having two pairs of hairy membranous wings. They are closely related to Lepidoptera (moths and butterflies) which have scales on their wings, and the two orders together form the superorder Amphiesmenoptera. Caddisflies have aquatic larvae and are found in a wide variety of habitats such as streams, rivers, lakes, ponds, spring seeps, and temporary waters (vernal pools). The larvae of many species make protective cases of silk decorated with gravel, sand, twigs or other debris.
Many species of caddisfly larvae enter a stage of inactivity called the pupa stage for weeks or months after they mature but prior to emergence. Their emergence is then triggered by cooling water temperatures in the fall, effectively synchronizing the adult activity to make mate-finding easier. In the Northwestern US, caddisfly larvae within their gravel cases are called 'periwinkles.'[3]

Caddisfly pupation occurs much like pupation of Lepidoptera. That is, caddisflies pupate in a cocoon spun from silk. Caddisflies which build the portable cases attach their case to some underwater object, seal the front and back apertures against predation though still allowing water flow, and pupate within it. Once fully developed, most pupal caddisflies cut through their cases with a special pair of mandibles, swim up to the water surface, cast off skin and the now-obsolete gills and mandibles, and emerge as fully formed adults. In a minority of species, the pupae swim to shore (either below the water - see figure - or across the surface) and crawl out to emerge. Many of them are able to fly immediately after breaking from their pupal skin.

The adult stage of caddisflies, in most cases, is very shortlived, usually only 1-2 weeks, but can sometimes last for 2 months. Most adults are non-feeding and are equipped mainly to mate. Once mated, the female caddisfly will often lay eggs (enclosed in a gelatinous mass) by attaching them above or below the water surface. Eggs hatch in as little as three weeks.

Caddisflies in most temperate areas complete their lifecycles in a single year. The general temperate-zone lifecycle pattern is one of larval feeding and growth in autumn, winter, and spring, with adult emergence between late spring and early fall, although the adult activity of a few species peaks in the winter. Larvae are active in very cold water and can frequently be observed feeding under ice. In common with many aquatic insect species, many caddisfly adults emerge synchronously en masse. Such emergence patterns ensure that most caddisflies will encounter a member of the opposite sex in a timely fashion. Mass emergences of this nature are called 'hatches' by salmon and trout anglers, and salmonid fish species will frequently 'switch' to whatever species is emerging on a particular day. Anglers take advantage of this behavior by matching their artificial flies to the appropriate fly.

thanks to Anne and Ivan for help

in Ws an image of mating


Make: NIKON CORPORATION
Model: NIKON D40X
Software: Paint Shop Pro Photo 11,20
Exposure Time: 10/1000 sec
F-Stop: f/11.0
ISO Speed Ratings: 200
Focal Length: 105 mm
Date Taken: 2009-10-25 11:27
Metering Mode: Pattern
File Size: 115 kb
horias, marianas, Noisette has marked this note useful
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Critiques [Translate]

  • Great 
  • joska Gold Star Critiquer/Gold Note Writer [C: 404 W: 0 N: 1002] (5396)
  • [2009-10-27 5:47]

Excellent photo of this Insect speciesc, very good colors and sharpness!

Sergio
Wonderful capture this lovely moth(I think)
Lovely details and colors.
Horia

Ciao Sergio. Non so cosa sia ma la splendida luce, il perfetto dettaglio, l'eccezionale DOF e l'intrigante cielo azzurro ne fanno una macro di prim'ordine! Rilevante e vincente il contratso tra i toni cladi dell'insetto e il già citato azzurro di sofndo. C'è anche una magnifica diagonale. Una delle tue migliori!

Roberto

Sergio
Wonderful capture this lovely moth!
The colors is great!
The sky is great!
Mariana

  • Great 
  • zetu Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 645 W: 15 N: 1577] (6149)
  • [2009-10-27 7:13]

Hello Sergio
Wow! Wonderful colors and interesting insect. Well done
Regards
Razvan

  • Great 
  • foozi Gold Star Critiquer/Gold Note Writer [C: 1339 W: 0 N: 2569] (9065)
  • [2009-10-27 7:41]

Hi Sergio,
really wonderful to note such a lovely pose and a very exciting details.
Indeed very sharp and the colours are superns. The light really good that makes this shot a very detailed and beautiful.

Regards,
Foozi

  • Great 
  • anel Gold Star Critiquer/Gold Note Writer [C: 1722 W: 0 N: 3901] (15676)
  • [2009-10-27 7:52]

Bonjour Sergio,
Une image très colorée et lumineuse de ce qui me semble être une espèce de Plecoptera. Ce n'est pas un papillon, je pense. Les plecoptères vivent dans l'eau comme larves et sortent ensuite de l'eau quand ils ont atteint leur dernier stade de développement. Belle lumière sur l'insecte .
Meilleures salutations
Anne

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3808 W: 190 N: 11328] (34927)
  • [2009-10-27 8:30]

Ciao Sergio,
Anne is right: this is a fine capture of a species of Stonefly (Plecoptera).
Their structure and scaly wings make them related to lepidoptera.
Excellent sharpness and DOF against a nice blue sky BG.
Thanks and all the best,
Ivan

Ciao Sergio
per quanto riguarda l'ID mi spiace ma non posso esserti di aiuto: so comunque per certo che la foto è perfetta sotto ogni punto di vista. Dalla luce ai colori, dai dettagli alla messa a fuoco tutto è ritratto nel migliore dei modi.
Livio

Bellos contrastes con la luz forzada y buen enfoque debido a la dificultad que entrañaba este.
Detalles bien plasmados como los de las antenas. No conozco la especie Sergio.
Saludos: J. Ignasi.

Hello Sergio
very intersting capture very well photographed, great pose
details, colors and composition are excellent
Have agood night
Jacqueline

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