Presiroster or Pressiroster: How To spell?
The word Presiroster is misspelled against Pressiroster, a noun meaning "One of a tribe of wading birds (Pressirostres) including those which have a compressed beak, as the plovers."
Pressiroster has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings pre & iroster which should not be misspelled with single 'S'
Wrong Spelling:  pre-s-iroster  Correct Spelling:  pre-ss-iroster 
Find more incorrect spellings of Pressiroster to spell right way.