'Aedes aegypti' biting a human.
Source: Picture from the USDA website at http://www.ars.usda.gov/is/graphics/photos/aug00/k4705-9.htm. http://en.wiktionary.org/wiki/File:Aedes_aegypti_biting_human.jpg
Author: Original author: US Department of Agriculture; then denoised rescaled, enhanced with adaptive denois