The above are pictures I took on my microscope of one of my favorite microscopic organisms, Blepharisma.  This ciliate can be easily distinguished from other protists by its size and its reddish color, which is usually present in darker environments.  When viewed in areas with bright light, Blepharisma loses its reddish color.  This is due to the reduced production of a pigment in areas of bright light.

Notice in the above pictures, the organisms have ingested other protists.  The one on the bottom has ingested a large protist.  In the first picture, the ingested food is encircled by a clearly visible food vacuole, which digests the ingested food.