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Bats in Wisconsin. Family: VespertilionidaeMyotis lucifugus Little brown batMyotis septentrionalisNorthern long-eared Perimyotis subflavusEastern pipistrelleEptesicus fuscusBig brown batMyotis sodalisIndiana batLasiurus borealisEastern Red batLasiurus cinereusHoary batLasionycteris noctivagansSilver-haired bat.
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1. Acoustic Bat Monitoring System: Land & Water David Redell & J. Paul White
Wisconsin DNR
Bureau of Endangered Resources
Ecological Inventory & Monitoring
2. Bats in Wisconsin Family: Vespertilionidae
Myotis lucifugus Little brown bat
Myotis septentrionalis Northern long-eared
Perimyotis subflavus Eastern pipistrelle
Eptesicus fuscus Big brown bat
Myotis sodalis Indiana bat
Lasiurus borealis Eastern Red bat
Lasiurus cinereus Hoary bat
Lasionycteris noctivagans Silver-haired bat
3. Cave dwelling bats-hibernatorsOver-winter in Wisconsin
4. Foliage-roosting and tree cavity dwelling bats-migrate south rather than stay to enjoy Wisconsin’s winter
5. Life-history Bats vulnerable to extinction, in part because they are the slowest reproducing mammals on earth for their size
More than 50% of American bat species are in decline or already listed as endangered. Losses are occurring worldwide.
6. Why Bats? Loss of bats increases demand for chemical pesticides and can harm human economies
Primary predators of night flying insects
Ecosystem services
Diet includes agricultural and forest pests
Reduce reliance on chemical pesticides
Long-lived species with low reproductive capacity
Cautionary principle—as declining species are often slow and difficult to recover
Issues arise and we have little available information making it difficult to respond to concerns
Need to get in front with a comprehensive approach to describing bat activity, seasonal patterns, trends and distributions for the State of Wisconsin.
7. Past Methods & Improvements Shotgun collection
Detector in back of station wagon w/ generator
1960’s Mist-nets
1970’s & 1980’s: acoustic studies limited to researchers with large budgets and grant support -- used oscilloscopes & high-speed tape
Late 80’s and 90’s: handheld detectors becoming more available to the field biologist
2000’s: improvements & cost reduction
8. Bat Monitoring in the UK Strengths
Species distribution & trends for land area 2x the size of Wisconsin
High Volunteer retention
Weaknesses
Rely on heterodyne detectors
Biases to deal with
Extensive training required
9. UK Citizen-based monitoring Transect surveys
Hibernacula surveys
Waterway routes
Summer roost site monitoring
10. UK Species Distribution Maps
11. UK Species Trends
12. Citizen-based Bat Monitoring in Wisconsin Developed specifically for volunteer participation of citizens
Draw from and improve on the example of UK’s Bat Monitoring Program
Different detection system
Long-term Bat Monitoring Stations
Mobile detection system
13. Overview and ExamplesFrom this past summer Install 5 Long-term bat monitoring stations
Stationary units collecting bat pass data every night
Mobile units
Land-based surveys
Water-based surveys (Lakes & Rivers)
14. Location of Long-term Bat Monitoring Stations in Wisconsin
15. Long Term Bat Monitoring Station (LTBMS) Description 3 meter tower
top mounted weather-resistant microphone enclosure and reflector plate (30ş above horizon acceptance angle) with a pre-amp signal driver for the audio cable extension
10W solar panel orientated south
NEMA weather-proof locked enclosure which houses:
12V battery
charge controller (EMS Systems, Berkeley CA)
AnaBat detector and CF Storage ZCAIM (frequency division bat detection system)
16. LTBMS Sites Habitat context
near a water source
proximity to edge
Connectivity of features
Site access
accessible for on-site personnel to regularly maintain station
Sun Exposure
Unobstructed south facing view (present and future)
18. Identifying the bat in the recording Build a Reference Library of echolocation calls for each species
Capture the bat
Identify the bat
Release and Record
21. Tragus
26. Bat Monitoring Stations Tie to weather data
Index activity
Phenology and species patterns
Nightly, Seasonal, Multi-year
Investigate spatial context thru comparisons with mobile surveys
Use as reference for an area’s relative activity level
27. Exploratory Mobile Surveys Goals during development
To gather insight of bat activity and species diversity at LTBMS’
Identify data collection process
Provide map examples of mobile acoustic bat surveys Same broadband freq-div detector as in Stationary sites (LTBMS)
Time & Date stamp for each pass
ADDITIONS:
GPS unit
Latitude & longitude position fix of each bat encountered
Map the route traveled
PDA unit
View sonograms of passing bats in real time
36. Training, Equipment, Data Developing a training seminar & operator handbooks
Earn your wings >:< Different levels of participation—similar to water monitoring
A range of options sure to fit nearly any group or individual level of interest
Equipment cost of approximately $2,500 - $3,000 for a complete system
groups/individuals from an area may be able to work toward raising equipment funds, share or own equipment, and or take on individual responsibilities of organization and dissemination of data
Website: Central point of information transfer, Scheduled meetings, options, Network opportunities, Summaries, reports and news
Keep your eyes on the CBM website for link information
Indicate your level of interest and sign up to receive notices for locations, dates, and times of next training seminar (small groups)
Descriptions to look for on the website
Bridge roost locators and monitoring
Bat house roost monitoring
Field Trips
37. Acknowledgements Kemp NRS- Karla Ortman, Scott Craven.
UW-Green Bay Cofrin Arboretum- Robert Howe
UW-Stevens Point Schmeekle Reserve- Jim Bucholz, Ron Zimmerman, Eric Anderson
Urban Ecology Center- Tim Vargo
UW-Madison Arboretum
Wisconsin DNR, Bureau of Endangered Resources- Ecological Inventory & Monitoring Section
Web & GIS assistance- Jill Rosenberg
Bat Capture assistance & volunteers- UW Platteville- Jeff Heubschman and Matt Willey, Milwaukee County Zoo- Mike Frayer
Bat Conservation Trust- UK National Bat Monitoring Programme
EME Systems, Berkeley CA
Titley Electronics, Balina NSW Australia
AnaBat System Development- Chris Corben