What do you call a flat-topped mountain?
We apply the term mesa to a flat-topped mountain.
"Rrrack-rrrack-rrrack-rrrack-rrrack" is the call of the Mountain Chorus Frog (Pseudacris brachyphona). Specifically, the voice of the Mountain Chorus Frog is a raspy trill. Like that of Brimley's Chorus Frog (P. brimleyi), the call of the Mountain Chorus Frog is repeated at a rate of about two times per second. The ranges of the two frogs do not overlap, and the voice of the Mountain Chorus Frog is a bit harsher in sound.
The Rocky Mountain Tailed Frog (Ascaphus montanus) has no known call. Specifically, Rocky Mountain Tailed Frogs lack external eardrums. They live in and around rapidly flowing streams. Such a noisy environment gets in the way of communicating by sound, and Rocky Mountain Tailed Frogs are not known to vocalize at all.