Vocal Habits of the Åga · Vocal Habits of the Åga. Andria Kroner, Renee Ha, Anne Clark . PhD...
Transcript of Vocal Habits of the Åga · Vocal Habits of the Åga. Andria Kroner, Renee Ha, Anne Clark . PhD...
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Vocal Habits of the Åga
Andria Kroner, Renee Ha, Anne Clark PhD Student Binghamton University
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Background and MotivationPair loss
Connectivity
Communication
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Methods• Wildlife Acoustics recorders
• Set up in territories known to be active during the main breeding season
• Recording for one week, sunrise to sunset
• 1300 hrs ( > 400Gb) of recordings!
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Analysis“Clustering” detections and Software Training :
1. 1 hr at sunrise for each site
2. Defined two broad clusters: “Mariana Crow” and “Not Mariana Crow”
3. Calculated error
4. Accepted detections ≤0.5 distance (error rate 0.047-0.245)
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Results- False positivesError rate increased at further distances from center (0.56 error at 0.99 distance)
Most common false positives:
• *Micronesian Starling*
• Black Drongo
• Feral chicken
• Sea bird
• Mariana Kingfisher
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5 6 7 8 9 10 11 12 13 14 15 16 17 18
Cum
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Hour of day
Percent of detections at each site per hour
AGAT GAYA INAY MDUG OKGO RAND SAGU SAKA SONG SPIT SWIM UAGA UALA UPAL
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Detections per day
• Highly variable within and between sites!
• Implications for search effort
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10152025303540
6/29/16 6/30/16 7/1/16 7/2/16 7/3/16 7/4/16 7/5/16 7/6/16
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MDUG
0200400600800
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6/17/16 6/18/16 6/19/16 6/20/16 6/21/16 6/22/16D
etec
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UALA
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Are family groups noisier?
No significant difference (p=0.24)
Jose Antonio Diaz
UALAnestling
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Summary• Supports field observations of åga vocal behavior*
• Potential option for reducing human effort
• Can keep fine tuning training for auto ID
• Lots of flexibility in additional questions
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Future directions• How does pair density affect vocal
behavior?
• How does captive rearing vs. wild rearing affect vocal development?
Sarah Faegre
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Thank you!Wildlife Acoustics’ Scientific Product Grant
Suzanne Medina-Guam DAWR
Renee Ha, Sarah Faegre, Rumaan Malhotra- University of Washington
Questions?
Vocal Habits of the ÅgaBackground and MotivationMethodsAnalysisResults- False positivesSlide Number 6Detections per dayAre family groups noisier?SummaryFuture directionsThank you!