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Crocothemis erythrea


Crocothemis erythrea
Information sur la photo
Copyright: philippe hornus (amanengone) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 187 W: 54 N: 412] (2113)
Genre: Animals
Média: Couleur
Date de prise de vue: 2015-08-12
Catégories: Insects
Appareil photographique: Olympus E 30
Exposition: f/13.0, 1/250 secondes
More Photo Info: [view]
Versions: version originale
Date de soumission: 2016-12-27 15:52
Vue: 1049
Points: 4
[Ligne directrice - Note] Note du photographe
Topic

Crocothemis erythraea ((Brullé, 1832)

Phylogenetic classification

Root / Cellular organisms / Eukaryota / Unikonta / / Amorphea / / Obazoa / Opisthokonta / Holozoa / Filozoa / Apoikozoa / Animalia / Chonaobionta / Metazoa/ Eumetazoa / Bilateria/ Nephrozoa / Protostomia / Ecdysozoa / Panarthropoda / Tactopoda / Euarthropoda / Mandibulata / Pancrustacea / Hexapoda / Ectognatha / Insecta / Dicondylia / Pterygota/ Palaeoptera / Odonatoptera / Odonata / Epiprocta / Anisoptera / Libelluloidea / Libellulidae / Sympetrinae / Crocothemis / Crocothemis erythraea

Brief description

Medium-sized dragonfly (30 to 45 mm) with broad, flat abdomen. The wings are hyaline, with an amber spot on the basal part of the hind wings.

The entire body and the head of the adults are bright red for the males. The females and the immatures are of fawn colour. The thorax of the females carries a light strip (generally white) in the median position and two left and right, light-coloured lateral bands. Absence of dark spots on the head, thorax and legs.

The characters "amber spots of the hind wings" and "absence of dark spots" conjugated together make it possible to differentiate the genus Crocothemis from the other genera of Libellulidae.

The copy presented here makes it possible to fully appreciate the design of the anterior and posterior wings (see the "Guide to the Dragonflies of France and Europe - Delachaux and Niestlé editor for the precise description of the wings of dragonflies). Note, in particular, the additional radial, surmounted by a row of cells, as well as the enlarged discoidal field of the anterior wing. Presence of a pterostigma of fawn colour in the anterior side part of each of the four wings. Note also the presence of an amber spot in the anterior internal position of each of the two posterior wings.

Take note on the “totem” position of the abdomen on the insect.

Ecology

This insect is endemic to humid Mediterranean zones, in stagnant waters, mostly brackish (rice fields, pools of water ...). The specimen presented was observed in the Pont de Gau ornithological reserve, where stagnant lagoon waters are very present (as well as many birds).

Bibliography

• Links

o Crocothemis erythrea in Wikipedia
o Fauna Europaea – Fauna Database supported by the European Commission
o The IUCN Red List of Threatened Sepcies
o Muséum national d’Histoire naturelle [Ed]. 2003-2016. Inventaire National du Patrimoine Naturel
o Dragonflies of France and elsewhere
o Société Française d'Odonatologie
o Taxonomy & Systematics – Database
o Technique de prise de vue ultra rapide – Les meilleures prises de vue jamais réalisées
o Quelques milliers de photo somptueuses + tout sur les odonates

• Books

o Guide des libellules de France et d’Europe – K. D.B. Dijkstra / R.Lewingston – Éditions Delachaux et Niestlé K. D.B. Dijkstra / R.Lewingston
o Field Guide to the Dragonflies of Britain and Europe – K. D.B. Dijkstra / R.Lewingston – British Wildlife Publishing
o La Garrigue grandeur nature – Jean-Marie Renault – Les Création du Pélican / Vilo
o Précis de Sciences Biologiques - Zoologie / Invertébrés – P.P.Grassé, R.A.Poisson et O.Tuzet – Masson et Compagnie
o Classification phylogénétique du vivant – G.Lecointre et H.Le Guyader – Tomes 1 et 2 – Belin éditeur
o L’Encyclopédie des animaux – Jenni Bruce, Kareen MacGhee, Luba Vangelova, Richard Vogt – University of California Press.
o Le monde du vivant – Traité de biologie – W.K.Purves, G.H.Horians, H.C.Heller. – Sciences Flammarion et Sinauer Associates Incorporated – Massachusetts.

Shooting

• Date of shooting 12/08/2015 13:35:47
• Place of shooting Réserve de biodiversité – Domaine de la Palissade - France
• Latitude 43.37587 N
• Longitude 04.81053 E

• Camera

o Camera OLYMPUS DIGITAL CAMERA Model E-M1
o Objectif ZUIKO MinFocalLength 40 MaxFocalLength 150 Aperture 1: 2,8 - 3,5

• Picture Specification’s

o ImageWidth 4640
o ImageLength 3472
o BitsPerSample 16
o Compression Uncompressed
o Orientation Horizontal

• Shooting condition’s

o Light source Auto
o Metering mode Multi segment
o Picture mode Natural
o Exposure mode Aperture priority
o Focus mode Manual
o Focus process AF used
o Aperture f/13
o ExposureTime 1/250
o ISO Speed Rating 200
o FocalLength 150
o White Balance Temp Auto
o Noise Reduction 0
o Shading Compensation off
o Contrast normal
o Saturation normal
o Sharpness normal
o Mode image Natural

Raw treatement

• Raw treatment and many other interesting topics from Cambridge University

• Developpment of the raw file Olympus (*.orf) with DxO OpticsPro 11

• Colour

o White Balance Temperature 4852 K – Teinte -3
o Colour’s Accentuation vibrance 30 saturation 0
o Colour’s rebdering Referenced camera - Intensity 100 – Saturated colours protection – 20
o TSL none

• Light

o Compensation exposition none
o DxO smart lighting none
o Tonalité sélective -5, 2 -5 , -5
o DxO clear view 50
o Contraste 0, 30, 0
o Courbe des tons none
o Vignetage Auto, basé sur module optique décelé – Intensité 100 – Préservation 50

• Details

o Noise reduction prime luminance 40 – chrominance 100 – Basse fréquence 75 –
Pixel Morts 24
o Netteté de l’optique Globale 0.00 – Détails 50 – Bokeh 50
o Aberration chromatique Auto – Latérales – Intensité 100 – Taille 6 – Franges violettes OK
o Masque de netteté nothing

• Recadrage

o Horizon 32.75°
o Recadrage Manuel, Ratio 4/3
o Recroping area of 1943 x 1455 px off 4608 x 3456 px

Post treatment

• Tif file edition corel paintshop pro
• Sharpness improvement
• Improvement of the contrast
• Re sizing compatible with Treknature (max 800x800 – maximum size 300K)
• Publication jpg – compression mode : normal - intensity 10 – mode YCbCr 1x1 1x1 1x1


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Critiques [Translate]

  • Great 
  • tuslaw Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2703 W: 278 N: 4891] (19782)
  • [2016-12-28 19:22]

Hello Philippe,
Although the BG appears quite busy due to where it had landed, the dragonfly itself is flawless. Awesome focus and clarity with beautiful natural color tones. A fine looking specimen perfectly displayed. Great job!!
Ron

hello Philippe
une magnifique capture de Libellule, bonne netteté, bon rendu des ailes et de la transparence.
Amicalement
Roland

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