Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Naturally

Naturally as a bird warbles in May.
—Anonymous

As naturally as a chestnut bursts its pod, and a chicken its shell.
—Anonymous

Naturally as fungus grows out of a dying tree.
—Anonymous

Naturally as pigs squeak.
—Samuel Butler

As naturally as the descendant from a line of suicides thinks of killing himself.
—Nathaniel Hawthorne

Naturally as the bleating of a sheep.
—William Hazlitt

Naturally as needles turn to the loadstone.
—Frances Little

As naturally as bees swarm and follow their queen.
—Henry D. Thoreau