Florida Bonneted Bat Acoustic Data Analysis
Second Opinions ✺ Expert Manual Vetting ✺ Complete Acoustic Survey Reports
Our clients include private developers, state and federal agencies, tribes, private consultants, and educational institutions.
- False positives with acoustic monitoring are REAL and can significantly needlessly delay your development.
- If your consultant reports that you have Florida Bonneted bats in your project area, and does -not- have 25+ years of experience interpreting bat calls, it is recommended you get a second opinion on those recordings regardless if you have submitted a report to an agency.
- If your firm is relatively new to acoustic monitoring for bats, become a partner with BCM and confirm your T&E species results.
Florida Bonneted Bat Acoustic Data Services
Bat call analysis software simply points the researcher in a direction of likely identification. Certain software in regular use by consultants is no longer being developed. Threatened & Endangered species ID should also be checked by a bat acoustic expert with many years experience recording and interpreting bat calls signals. False positives occur with virtually -every single- Florida Bonneted bat project. This results in costly project delays at the least, at worst there is mis-directed mitigation costing hundreds of thousands of dollars. We provide an important second opinion service on individual call identifications, extremely helpful in confirming or rejecting endangered species presence in your project area critical for informed management decisions. Send us a few of your T&E files for confirmation; price is $295 up to 1 hour with 1 hour minimum on all projects, then $125/hour thereafter.
Data Analysis with Manual Review - for USFWS Compliance Projects
Site Level Results Backed by Manual Review
We initially sort recordings using the most modern software tools available. Representative files of each species in each site folder (which may contain weeks of data) are manually reviewed to confirm presence at that site. All files with any software hint as Florida bonneted bat are manually reviewed. We go 4 ID levels deep to ensure there is no possibility the review will be called into question; most researchers only look at top level classifications.
Deliverables are the master spreadsheet ready to be summarized for inclusion in your own report. This solidly establishes species presence with the least amount of cost regardless of the number of files in the total project.
Complete Acoustic Survey Reports
We summarize results of two software analysis outputs and manual-vetting of species of interest either by site level, per site per night, or simply project-wide. In addition to the acoustic data, data sheets and photographs can be included. Uptime is calculated from log files. This service is attractive to those renting detectors or are consumed with field work and are looking for a turnkey analysis and report service.
Files We Accept and Transfer Methods
- Full-spectrum (FS) Recordings only (*.WAV format).
- Data must be organized in separate folders by detector (site).
- We suggest file transfer services such as SendBig.com (up to 30 GB per transfer with account) or WeTransfer.com, or your own company system if desired. Alternately you can copy files to an external flash/hard drive and mail.
- We do not recommend zero-cross (frequency division) recordings (.zc format); expect cost and processing time increase.
Pricing and Turn-around Time on Recordings:
$295 flat fee up to one hour
$125 each additional hour
Per Site/Per Batch
$450 for first site
$250 each additional site
In addition to Analysis/Review fee
2-5 business days
All Pricing and Turn-around Time estimates are based on materials meeting the acceptance and information criteria above. Expedited service may be available at an additional 50% up-charge fee during certain times of the year.
Why Bat Acoustic Call ID is Deceptively Difficult
Analysis protocols relying upon auto-classifiers alone are deeply flawed when it comes to determining species presence. There is no computer-program sophisticated enough to take into account all the problems inherent in relying upon automated quantitative analysis of "images" (e.g., spectrographs and spectrograms of echolocation calls). This is because there will always be certain qualitative analysis steps required to address the ambiguities in echolocation call recordings created by:
- Artifacts present in echolocation recordings caused by atypical bat behavior (e.g., the affects active foraging and socializing has on the metrics available in sound files vs. those found typical commuting, search phase bat calls)
- Atmospheric affects that change how high-frequency sound behaves in air, thus how faithfully it is recorded for confident analysis (e.g., the affects of micro-climate, temperature, wind, and humidity)
- The uncontrollable range, approach angle, speed, and direction with which the bat approaches a stationary microphone --and-- the intensity and/or frequency with which the bat echolocates, and other noise in the environment which competes with the bat's ultrasound, any of which can affect signal quality and therefore classification accuracy
- The presence of conspecifics and/or allospecifics in the same recording and the affect that multiple bats have on auto-classification accuracy.
- Variations in recording hardware, microphones, and recording settings will have significant impact on the number of recordings in a collection that can be classified to species. Liberal settings simply generate a massive data burden of recordings that will never be classified to species, and low end microphones -do not- faithfully record full spectrum sound.
Considering all of the above, automated classification software is simply a tool to guide the researcher towards the most likely recordings of a particular species. Your data submitted to BCM is reviewed by a bat biologist with years of invaluable experience deploying multiple makes and models of detectors at sites across the country, actively monitoring/recording bats in the wild observing behavior during recordings, and recording voucher calls from individuals where species was confirmed.