Complex sentence: The Brazos Water Snake or Harter's Water Snake ("Nerodia harteri") is a species of mostly aquatic, non-venomous, colubrid snake native to the United States, only in north-central Texas along the Brazos River system.
Split into simpler sentences: The Brazos water snake or Harter's water snake ("Nerodia harteri") is a species of mostly aquatic, nonvenomous, colubrid snake native to the United States. It is found only in north-central Texas along the Brazos River system.