different between hematophagous vs hematophagy

English

hematophagous (not comparable)

hemato- +? -phagy

hematophagy (uncountable)

The practice, of some animals, of feeding on blood.
- 2005, Conrad C. Labandeira, "Fossil History and Evolutionary Ecology of Diptera and Their Associations with Plants", in David K. Yeates & Brian M. Wiegmann (editors), The Evolutionary Biology of Flies, page 239
  Most Lower brachyceran taxa also have nectarivorous or related fluid diets..., although a few basal clades have shifted to predominantly hematophagy; particularly the Spaniidae, Anthericidae, Xylophagidae, and certain lineages within the Tabanidae.

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