A tigers tale!

Near the river there lived a tiger!
 Jack the tiger was strong and wise!
He came out at night and fish were his prize!
 Sometimes, when he needed a snack he would catch a stray rat!
Others, a poor bird would get to close and off with his head!
 One day Jack decided to take a swim!
He ran to the waters edge and jumped head first in!
 Swimming under water he looked to his left, to his surprise a canian, was swimming away as fast as his tail would let him!
 Wrong place of town to try to hide!
Five minutes later Jack pinned him under a rock and ate out his eyes!
 That will teach the rest to trespass on my territory!
The lion remains king of the jungle but Jack remains king of his flat land and wet springs!