Casowaries or Cassowaries: How To spell?
The word Casowaries is misspelled against Cassowaries, which is plural of "Cassowary"
Cassowaries has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings ca & owaries which should not be misspelled with single 'S'
Wrong Spelling:  ca-s-owaries  Correct Spelling:  ca-ss-owaries 
Find more incorrect spellings of Cassowaries to spell right way.