Leonard J Peyton
28 Jun 1971
- Mt. McKinley National Park-Mile 55.2 Mt. McKinley Rd.
- 63.5 -150.1
- 1200 meters
- NAGRA III
- Sennheiser MKH 104
- Parabola 99.1cm/30.5cm (39in/12in)
NOTES: First series on this tape, bird responded to playback of its own song. Last series on this tape, bird's song recorded without inducement or playback.; Purpose of sound: singing in defense of nesting territory; Behavior accompanying vocalization:perched in top of Willow bushes.