I also told you that these birds were a kind of overgrown Wren; and before we call upon Mrs.Jenny Wren, I want to tell you about a bigger relative of hers that Olive and I knew when we were in the Rocky Mountains.

He is called the Rock Wren--" "Oh! I know--because he lives in the Rocky Mountains," said Dodo, clapping her hands at this discovery.
"Yes, that is partly the reason," resumed the Doctor, after this interruption, "but those mountains are very many, and varied in appearance, like most others: covered in most places with pine trees, but including in their recesses grassy meadows and silvery lakes.

Some parts of those mountains are the home of the Rock Wren, but the little fellow is quite as well satisfied anywhere else in the western parts of the United States, if he can find heaps of stones to play hide-and-seek in with his mate, or great smooth boulders to skip up to the top of and sing.

So you see the mountains and the Wrens are both named for the rocks.
"Do these Wrens look like our kind and act that way ?" asked Nat.

"Ours always make me think of mice." "All kinds of Wrens are much alike," answered the Doctor.