The Lizard in "Nim's Island" is a Bearded Dragon
Yes Brontosaurus does mean Thunder Lizard.
to be lizard
Mother lizard.
Mouse lizard.
Fast lizard
Lacerta.
King lizard.
Lizard have their own territories and preferred hunting spots, so it's normal for a lizard to do that.
If you mean classification then reptilia, there are many different lizard families.
your big sausuage
Brontosauruses name comes from a greak word meaning lizard or big lizard.
If you mean Togera, it is a large lizard from a video game