From the book

“Entertaining, in a word. How odd, too, how unlike any other songster. He pops and gurgles and rattles and caws; he squawks, chuckles, cackles, mews, hoots, clucks; he whistles, he catcalls, he barks, he quacks . . .”

Listen to the variety of sounds this male chat offers in just two minutes. Hear how he sings that first brief whistle throughout the two minutes, but at about a minute and 15 seconds he first introduces a nice series of whistled notes.