For 10 points, name this double-reed woodwind pitched in F, whose pitch
 is a perfect fifth lower than its closest relative, the oboe.
Vincent D'Indy's Symphony on a French Mountain Air begins with a melody played by this instrument.
 This instrument plays a theme representing Central Asian merchants in Alexander Borodin's symphonic
 poem In the Steppes of Central Asia. The first bars of the love theme from Tchaikovsky's Romeo and Juliet
 Fantasy Overture are played by the violas and this instrument, which plays the melody of the "call to the
 dairy cows" in the William Tell Overture. It also plays the opening solo of the second movement Largo in
 Dvorak's New World Symphony. For 10 points, name this double-reed woodwind pitched in F, whose pitch
 is a perfect fifth lower than its closest relative, the oboe.
Vincent D'Indy's Symphony on a French Mountain Air begins with a melody played by this instrument.
 
{English horn} [or {Cor anglais}]