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Photographic gallery.  Thousands of particles under the microscope.

Fly Fecal Pellet

Transmitted Oblique Cross Polarized Light and Reflected Darkfield Illumination


Significance in the Environment:

Characteristic Features:
Insect, spider, and mite fecal material contains highly birefringent nitrogen containing compounds. The dominant compound is guanine. A variety of other compounds are present, which includes those specific agents responsible for any allergic reactions to each species. The guanine is evident here as the bright spots in the otherwise dark deposit.

Associated Particles: