hummingbird feeders - is sugar water healthy for them?
Hummingbirds absolutely eat insects, and HONEY and BROWN SUGAR are a huge NO NO.
  The following is a statement from: http://wildbirdsonline.com/index.html


  Every year, as more studies are completed, we learn more about
  hummingbird life and diets. However, we find that some people think
  that hummers can survive on nectar alone. Nectar provides quick energy
  to sustain their extremely high metabolic rate and little else. This
  is important enough that the shape of the bills of hummers have
  evolved in partnership with the flower shapes that they frequent.
  Consequentially, there is a wide variety of hummingbird bill lengths
  and shapes among the more than 300 species that exist.
  
  There is another critical food source for the hummers. Essential
  vitamins, minerals, amino acids, proteins, oils and fats, fiber, etc.
  all come from the insects they eagerly consume, not the nectar. Their
  preferred insects include, but are not limited to: small beetles, true
  bugs, weevils, flies, gnats, mosquitoes, aphids, mites, leafhoppers,
  flying ants, and parasitic wasps. Their favorite insect food source is
  the spider and harvestmen (daddy long legs). Some ornithologists
  estimate that spiders are between 60% and 80% of their diet.


But there are lots of other resources for you to find accurate information about feeding hummingbirds.