Using extended‐duration audio recordings to survey avian species
Abstract
Point‐count surveys are widely used to infer avian presence and estimate species richness. Advancements in bioacoustic technology enable automated surveys that can supplement human‐based point‐count surveys with expanded temporal and spatial coverage. We surveyed birds in 13 Sierra Nevada and Cascade Range (CA, USA) montane meadows from May to August 2006 using 8 point‐count surveys and automated audio recorders (ARU) to compare species richness between the 2 methods and evaluate the use of ARUs as a monitoring tool. We analyzed species richness using 30 minutes of ARU data per point and 2 point‐count surveys. Automated audio‐recorder data revealed 14 species per meadow (56 species total) while point counts detected 16 species per meadow (67 species total). Automated audio recorders provided >1,100 additional hours of data with personnel effort similar to 2 point‐count surveys. An asymptote in species richness was reached for every meadow using ARU data and 8 of 13 meadows using 2 point‐count surveys. We detected 81 species during all 8 point‐count surveys. We used SonoBird (DNDesign, Arcata, CA) software to search for 24 species detected by point‐count surveys but not in the manually sampled subset of audio files. We detected 22 additional species, bringing the total audio‐file species detections to 85, 4 more than detected by 8 point‐count surveys. We conclude that audio recordings and analysis provide an alternative to avian point‐count surveys or as a supplement to increase their accuracy, particularly over larger temporal and spatial scales, or for species with low detectability. © 2012 The Wildlife Society.
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ARUs create permanent archives that can be reanalyzed with new algorithms to address questions not imagined at the time of recording.
“They also create permanent archives that can be reanalyzed with new algorithms to address questions not even imagined at the time of recording”
From Listening forward: emerging roles of bioacoustics in ecology, evolution, and conservation (2026) · cites this paper as Tegeler et al. 2012
By eliminating the need for constant human presence, ARUs have greatly expanded the spatial and temporal reach of monitoring, often outperforming traditional surveys in detecting elusive species and rare events.
“By eliminating the need for constant human presence, ARUs have greatly expanded the spatial and temporal reach of monitoring, often outperforming traditional surveys in detecting elusive species and rare events.”
From Listening forward: emerging roles of bioacoustics in ecology, evolution, and conservation (2026) · cites this paper as Tegeler et al. 2012
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- Authors
- Tegeler, A. K., Morrison, M. L., & Szewczak, J. M.
- Affiliations
- Cal Poly Humboldt (US)
- Texas A&M University (US)
- Corresponding author
- Tegeler, Amy K.
- Venue
- Wildlife Society Bulletin
- Publisher
- Wiley
- Published
- 2012-02-22
- Volume
- 36
- Issue
- 1
- Pages
- 21-29
- ISSN
- 2328-5540 (ISSN-L)
- OpenAlex
- W2128509121
- Cited by
- 49
- References
- 37
- Citations by year
- 2026: 4 · 2025: 4 · 2024: 1 · 2023: 3 · 2022: 5 · 2021: 6 · 2020: 1 · 2019: 5 · 2018: 7 · 2017: 7 · 2016: 2 · 2015: 3 · 2014: 1
- FWCI
- 1.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Wildlife Society Bulletin (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
- Physical Sciences › Environmental Science › Ecology › Wildlife Ecology and Conservation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Developmental Biology › Animal Vocal Communication and Behavior
- Keywords
- point counts, bird species richness, bird detection, bioacoustic monitoring, montane meadows, Sierra Nevada, Cascade Range
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