One day, little Johnny asks his mother, "What kind of bird brings white babies?"

With a grin, his mother replies, "A stork does, dear."

Satisfied, little Johnny continues, "What kind of bird brings black babies?"

"A raven, dear."

Confused, little Johnny then asks: "Well, then, what kind of bird brings no babies at all?"

(His mother was getting irritated now)

"What do you think, dear?" asks his mother.

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Little Johnny thinks for a minutes, then says, "A swallow!"