kHz
Bidragsyter
Walter A. Thurber Media from this contributor
Dato
08:00
Lokalitet
Hacienda Los Pinos
Usulután, El Salvador
Media from this location Illustrert sjekkliste- Age and sex
- Juvenile, Unknown sex - 1
- Oppførsel
- Courtship, display, or copulation
- Lyder
- Lokkelyd
- Lydavspilling
- Ikke spesifisert
Kommentarer
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.
Teknisk informasjon
- Opptaker
- UHER 4000L
- Mikrofon
- Tilbehør
- Parabola 45.7cm (18in)
Arkivinformasjon
- Digitalisert
- 6 May 2002 - Shelagh A. Smith