Voice - Can be heard throughout the day in summer; rarely heard in winter. There are four kinds of common sounds or calls:
(1) Tremolo - the well known loon's "laughter" which consists of three to eight or ten notes uttered rapidly either as a medium or high-pitched tremolo.
(2) Yodel - a variation of "a-a-whoo-quee-quee-whe oooo-quee" repeated five or six times, the pitch rising on the "whoo" and undulating on the rest.
(3) Wail - a long call sounding like "ahaa-ooo-ooooo oooo-ooo-ahh" with a rise, then a fall in pitch in the long middle syllables.
(4) Talking - simple, one-syllable notes used to talk to each other. It sounds like a "kuk" or "kwuck".
