kHz
Contributor
Walter A. Thurber Media from this contributor
Date
8:00 AM
Location
Hacienda Los Pinos
Usulután, El Salvador
Media from this location Illustrated Checklist- Age and sex
- Juvenile, Unknown sex - 1
- Behaviors
- Courtship, display, or copulation
- Sounds
- Call
- Playback
- Not specified
Media notes
NOTES: WELL-FED, AGGRESSIVE NESTLING AT BASE OF TREE WHERE NEST FALLEN. WHEN BIRD WAS APPROACHED IT ABANDONED ITS CONCEALMENT POSE AND ADOPTED A THREAT POSTURE - MOUTH OPEN, WINGS SPREAD, CROWN ERECT. IT BEGAN TO SCREAM WHEN I REACHED OUT MY HAND A RASPY SCREAM USUALLY, BUT NOT ALWAYS, PRECEEDED BY A WHISTLE. THE SCREAM WAS PRODUCED DURING EXHALATION; THE WHISTLE MAY HAVE BEEN INHALATION. THIS SCREAM-WHISTLE VOCALIZATION IS HEARD UNDER OTHER CONDITIONS WHEN THERE IS NO THREAT OR FRIGHT BNA: These "screams" probably represent renditions of the "eee-grack" call (sensu BNA) given by a nestling in response to a perceived threat. [CAM - 23 February 2005]. Other Behaviors: Perform Visual Display, Emit Alarm. Habitat: River.
Technical information
- Recorder
- UHER 4000L
- Microphone
- Accessories
- Parabola 45.7cm (18in)
Archival information
- Digitized
- 6 May 2002 - Shelagh A. Smith