How pleasant the life of a bird must be, Flitting about in each leafy tree;

In the leafy trees so broad and tall,

Like a green and beautiful palace hall,

With its airy chambers light and boon,

That open to sun and stars and moon;

That open to the bright blue sky,

And the frolicsome winds as they wander by.

–“Birds in Summer,”
Mary Howitt

Read to identify the simile in this stanza. Then, answer the questions.

What is being compared?

What does the simile help the reader understand?