Complex sentence: A dark morph,'neoxenus', termed "Cory's" Least Bittern, originally described by Cory as a separate species in 1885, from specimens collected in Florida, is exceptionally rare, with only five sightings since 1950.
Split into simpler sentences: A dark morph,'neoxenus', termed "Cory's" Least Bittern was originally described by Cory as a separate species in 1885, from specimens collected in Florida. Once more common, it is now exceptionally rare, with only five sightings since 1950.