Avoidance conditioning and a modified method of limits were used to measure the absolute threshold for pure tones from 0.25 to 8.5 kHz and the frequency difference limen in eight parakeets. The parakeet audibility curve shows greatest sensitivity at 2.86 kHz and resembles a narrow bandpass filter. High-frequency sensitivity decreases at the rate of 40 dB/octave above 2.86 kHz. For frequencies below 2.86 kHz, sensitivity decreases at the rate of about 15 dB/octave. Direct measures of the frequency difference limen at six frequencies between 0.50 and 5.7 kHz show a sensitivity only two to three times worse than man. The Weber fraction (Δf/f) for the parakeet is essentially flat at 0.007 over the frequency range from 1.0 to 4.0 kHz.