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Slender vervain (verbena) with a crab spider when...of Somerville Lake State Park. Texas  
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Slender vervain (verbena) with a crab spider when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 28, 2024

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Thumbnail 3610-06: Slender vervain (verbena) with a crab...Lake State Park. Texas Show full size picture

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Similar   Thumbnail of picture 3610-07: Flowers of slender vervain (verbena) when exposed to regular daylight ... Somerville Lake State Park. Texas, August 28, 2024 Thumbnail of picture 3825-15: Slender vervain (verbena) when exposed to regular daylight as well as ... of Somerville Lake State Park. Texas, May 16, 2026 Thumbnail of picture 3610-05: Slender orange-bush lichen (Teloschistes exilis) on a twig of elm when ... Somerville Lake State Park. Texas, August 28, 2024 Thumbnail of picture 3613-05: Slender orange-bush lichen (Teloschistes exilis) when exposed to ... Lake State Park. Texas, September 1, 2024 Thumbnail of picture 3610-09: Sandburs (Cenchrus spinifex) when exposed to regular daylight as well ... Somerville Lake State Park. Texas, August 28, 2024
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The image shows a crab spider on a slender vervain plant, with two photos: one taken under regular daylight and another under ultraviolet (UV-A) blacklight. The top photo displays the spider in its natural state, appearing white or light yellow due to the lack of visible pigments that absorb certain wavelengths of light.

In contrast, the bottom photo reveals a remarkable transformation when illuminated by UV-A blacklight from 365 nm. This causes the spider's body to glow with an intense blue-green coloration, similar to the effect observed in bioluminescent organisms. The greenish hue is particularly noticeable on the spider's legs and abdomen. This phenomenon highlights the unique properties of certain arachnids that can absorb UV light and emit a bright glow when exposed to these specific wavelengths.

The background of both photos features a slender vervain plant, providing context for the spider's habitat. Overall, this image showcases an intriguing example of how different lighting conditions can alter the appearance of organisms, revealing fascinating details about their biology and behavior. – AI vision

El verbena esbelto con una araña de pescador cuando está expuesto a la luz diurna normal y cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm desde un camino cerca de Birch Creek Unit of Somerville Lake State Park. Texas, 28 de agosto de 2024. La imagen muestra una araña de pescador en una planta de verbena esbelto, con dos fotos: una tomada bajo luz diurna normal y otra bajo luz negra ultravioleta (UV-A). La foto superior muestra la araña en su estado natural, apareciendo blanca o amarillo claro debido a la falta de pigmentos visibles que absorben ciertas longitudes de onda de luz. En cambio, la foto inferior revela una transformación notable cuando se ilumina con luz negra UV-A de 365 nm. Esto hace que el cuerpo de la araña brille con una intensa coloración azul-verde, similar al efecto observado en organismos bioluminiscentes. El matiz verdoso es particularmente notable en las patas y el abdomen de la araña. Este fenómeno destaca las propiedades únicas de ciertos arácnidos que pueden absorber luz UV y emitir un brillo intenso cuando se exponen a estas longitudes de onda específicas. El fondo de ambas fotos muestra una planta de verbena esbelto, proporcionando contexto para el hábitat de la araña. En general, esta imagen muestra un intrigante ejemplo de cómo diferentes condiciones de iluminación pueden alterar la apariencia de los organismos, revelando detalles fascinantes sobre su biología y comportamiento. – Spanish translation


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