Nico Posted September 20, 2013 Share Posted September 20, 2013 Chalwatzis, N. 2013. Polyommatus icarus, Rottemburg, 1775 (Lepidoptera, Lycanidae). Common Blue. Butterfly photographed in visible and ultraviolet light. reference: http://www.ultraviol...tera-lycanidae/ Polyommatus icarus, Rottemburg, 1775 DE: Hauhechel-Bläuling, Gemeiner BläulingEN: Common Blue Photographed near Burgarach, Southern France 29 July to 8 August 2013. Polyommatus icarus is one of the most common species of the family Lycanidae. This species has a Palaearctic distribution. The caterpillars feed on the various species of Fabacea (e.g. Lotus spp., Lathyrus spp., Trifolium spp., Astragalus spp.).Similar to the species Polyommatus coridon that was published here http://www.ultraviol...tera-lycanidae/ the outside or “downside” of the wings has a UV reflection that doesn’t make the animal stand out from the background. However, in P. icarus the visibly black and red marks on the wings show a stronger contrast compared to the rest of the wing because they are entirely UV-black.The insides, or upper sides, of the wings that are only visible in active animals and appear to humans in bright blue have a very strong UV-reflexion. This makes the blue (inner) sides of the wings appear much brighter than the background in the UV-capture. UV images were taken with a broadband-modified Panasonic Lumix G1 and the EL-Nikkor 80mm/f5.6 at f8. Visible light image: Panasonic Lumix GH2 (unmodified) with Tokina AT-X 90 mm Macro.image reference: CHA_P1200160_130731 Visible light image: Panasonic Lumix G1 with EL-Nikkor 80/f5.6, Baader UV/IR-cut-filterimage reference: CHA_P1100266_130729 UV-image, Baader U-filter 2”, ISO 400, UV-flash MR21Nimage reference: CHA_P1100271_130729 crop from the image above UV-image, Baader U-filter 2”, ISO 400, UV-flash MR21Nimage reference: CHA_P1100629_130808 [published: 20 September 2013] Link to comment
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