When Rev. J. H. Langille heard his first Regulus calendula, he said, “The song came from out of a thick clump of thorns, and was so loud and spirited that I was led to expect a bird at least as large as a thrush. Chee-oo, chee-oo, chee-oo, choo, choo, tseet, tseet, te-tseet, te-tseet, te-tseet, etc., may represent this wonderful melody, the first notes being strongly palatal and somewhat aspirated, the latter slender and sibilant and more rapidly uttered; the first part being also so full and animated as to make one think of the water-thrush, or the winter wren; while the last part sounded like a succeedant song from a slender-voiced warbler. Could all this come from the throat of this tiny, four-inch Sylvia? I was obliged to believe my own eyes, for I saw the bird many times in the act of singing. The melody was such as to mark the day on which I heard it.” H. D. Minot says, “In autumn and winter their only note is a feeble lisp. In spring, besides occasionally uttering an indescribable querulous sound, and a harsh, ‘grating’ note, which belongs exclusively to that season, the Ruby-crowned wrens sing extremely well and louder than such small birds seem capable of singing. Their song begins with a few clear whistles, followed by a short, very sweet, and complicated warble, and ending with notes like the syllables tu-we-we, tu-we-we, tu-we-we. These latter are often repeated separately, as if the birds had no time for a prelude, or are sometimes prefaced by merely a few rather shrill notes with a rising inflection.” Messrs. Baird, Brewer and Ridgway say that “The song of this bird is by far the most remarkable of its specific peculiarities,” and Mr. Chapman declares, “Taking the small size of the bird into consideration, the Ruby-crown’s song is one of the most marvellous vocal performances among birds; being not only surpassingly sweet, varied and sustained, but possessed of sufficient volume to be heard at a distance of two hundred yards. Fortunately he sings both on the spring and fall migrations.” Mrs. Wright describes the call-note as “Thin and metallic, like a vibrating wire,” and quotes Mr. Nehrling, who speaks of the “Power, purity and volume of the notes, their faultless modulation and long continuance.” Mr. Robert Ridgway wrote that this little king of song was one of our very smallest birds he also “ranks among the sweetest singers of the country. It is wonderfully powerful for one so small, but it is remarkable for its softness and sweet expression more than for other qualities. It consists of an inexpressibly delicate and musical warble, astonishingly protracted at times, and most beautifully varied by softly rising and falling cadences, and the most tender whistlings imaginable.”