Seldom vocalizes; a very high, thin trill almost like a hiss, ~2–3 seconds, falling then rising, given at long intervals, plus excited high peeping contact notes. The thin near-ultrasonic whistle is hard for some ears — train clients to listen high. Trainee search term: 'Red-banded Fruiteater Pipreola whitelyi' on Xeno-canto / Macaulay Library; filter to Bolívar, Venezuela.