Trichuris trichiura 
Bee pollen. Bee pollen in fecal smear 
  (unstained, high power). Humans frequently take bee pollen as a supplement to 
  their diets. Pollen grains may be found in the feces of these individuals where 
  they bear a marked resemblance to eggs of the nematodes, Trichuris or 
  Capillaria. Although they have what appear to be polar plugs that are 
  similar to those that occur in the eggs of these nematodes, the internal contents 
  do not resemble an undeveloped ovum. These pollen grains measure 40 to 45 µm 
  long by 20 to 25 µm wide.