Bird Collision Corps (BCC) in a Box
Create your own Bird Collision Corps program in your community!
BCC volunteer surveying at American Family Insurance. Photo by Brenna Marsicek/SoWBA
BCC volunteers surveying at UW-Madison. Photo by Brenna Marsicek/SoWBA
About Bird-window collisions & the Bird Collision Corps
Indigo Bunting photo by Maria Parrott-Ryan, BCC volunteer
Bird-window collisions kill over 1 BILLION birds every single year in the United States. That shocking number can be drastically reduced when communities work together to ensure windows that are most problematic for birds are treated to prevent collisions. Typically, the first step in making change in your community is to collect data on when, where, and to what extent the problem is happening. That’s where the Bird Collision Corps (BCC) program comes in. People in power typically need data to prove that there is a problem. BCC can facilitate a way for your community to collect that critical data.
The BCC originally started in 2018 in Madison, WI as a partnership between Southern Wisconsin Bird Alliance and the University of Wisconsin-Madison’s departments of Forest and Wildlife Ecology and Facilities Planning and Management. The goal was to study the top 10-15 buildings identified as likely collisions hotspots, document if birds do hit those windows, and if problem windows are identified, come up with solutions to fix them. The program has been a tremendous success in terms of volunteer engagement, survey site growth (now surveying at 12+ locations around the Madison area), and window mitigation efforts. Learn more here! The biggest success story is BCC data helping implement the Madison Bird-safe Glass Ordinance in 2020, with an identical ordinance passing in Middleton in 2024.
How Bird Collision Corps works: The Nitty Gritty
Bird Collision Corps volunteer surveying around the capitol. Photo by Jill Ness
TIMING: BCC runs for about 6 weeks during spring and fall migration (in Madison, it runs mid-April to June 1, and mid-September to November 1). The survey period should be set to capture the bulk of spring and fall bird migration through your area. Surveys should be completed by 9:30 AM to minimize the number of birds that are removed by scavengers.
REGISTRATION: Volunteers sign up for a specific site on one or more days of the week, and will survey at their site on designated day(s) during the survey period. For example, if Susan signs up for Mondays at the bank, she surveys every Monday at the bank before 9:30 AM each week during the survey period.
FINDING BIRDS: If a volunteer finds a dead bird, they collect it with a plastic zip-lock bag and fill out a data form. The bird must then be frozen (either at home, or at an identified drop-off site). The a volunteer finds a live bird, they collect it in a cloth or paper bag, fill out the data form, and bring it to a local wildlife rehabilitator.
DATA COLLECTION: Whether the bird is dead or alive, the volunteer should document it and submit an observation form using an online data portal. We recommend using iNaturalist because it is free, allows for uploading photos and GPS location tagging, allows for customized forms, allows the online community to help identify birds to species, and facilitates a collaborative and engaged feeling among volunteers. Here is an example iNaturalist BCC project. Survey123 (ArcGIS), Global Bird Collision Mapper, or dBird.org are additional options.
Starting your own BCC program
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BCC is a citizen science program, meaning the vast majority of the field work is done by trained volunteers. However, it is critical that you have a coordinator for the effort who has the time and skills to:
manage and communicate frequently with volunteers,
interface with building owners,
set up and manage the data collection system,
analyze or delegate the analysis of data, and
communicate results and next steps to volunteers, building owners, and the community.
This level of coordination takes approximately 25 hours per month in April, May, September, and October. Other months involve less of a time commitment.
These roles can be filled by one person or multiple. We also highly recommend forming a partnership with a local wildlife rehabilitator who can take any injured birds your volunteers find.
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Considerations for identifying high-risk buildings:
has a lot of glass on the exterior facade,
has nice habitat nearby that would be reflected in the glass,
contains a “pass-through” scenario where two panes of glass run parallel and creates the illusion of clear space to fly through,
uses a lot of exterior lights at night.
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One of the biggest frustrations volunteers have in a citizen science program is when they don’t hear from or hear back from their coordinators. You can prevent this by setting up a schedule for communications.
SoWBA has many email templates that we use, ranging from a confirmation email after the volunteer signs up to the weekly check in email. The suite of email templates is included HERE so you can use them as a starting point for your communications.
In general, your communications calendar should look something like:
2-3 months in advance of survey period: communicate with building owners to get them on board with participating
1-2 months in advance: begin marketing for new volunteers
asap after volunteers sign up: send confirmation/welcome email
1 week in advance: send 1 week reminder
5-7 days in advance: send site team and tips email
1st day of survey period: send launch email
weekly emails throughout survey period to whole group with updates and check-ins
last day of survey period: send wrap up email with next steps
within 1 month after finishing survey period: send thank you and results of data analysis to volunteers and site owners.
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The BCC model emphasizes the importance of building a relationship and buy-in from the building owners. Building owners who are aware of and open to the project are more likely to do something if there is a problem window identified. We do not want to ask volunteer to monitor a building where the owner is adamantly against making change because it is a waste of the volunteer’s and your time! Get in touch with the building owner. You can use language provided here, if you wish:
Dear [NAME],
I hope this finds you well! I work/volunteer for [ORG], a local non-profit, and help run the Bird Collision Corps, a citizen science program powered by volunteers. This program started in 2018 in Madison (swibirds.org/bcc) and is now expanding to our community.
The goal of the program is to study if and where birds are colliding with windows, and offer solutions if a problem area is found. Because [BUILDING NAME] has a lot of buildings with beautiful windows, I wondered if you might be interested in partnering with us this year to assess your building? We don't do any building-shaming, but always to work collaboratively and in partnership with the building owners and occupants and celebrate your community-mindedness.
The process: we monitor during two times of the year, spring ([TIMEFRAME]) and fall ([TIMEFRAME]). Our trained volunteers walk the perimeter of the building in the early morning (before 9:30am) and document any evidence of bird-window collisions. We try to have a volunteer monitor every day of the week during those two time periods.
There is no cost to you, nor significant staff time required for you to participate. If you're on board, I would just stay in communication with you as our volunteers are lined up, and let you know how things are going throughout the survey period. At the end of each survey period, I'd send you results (results aren't shared publicly), and we can talk them through.
Please let me know if you'd like to talk more about this either on the phone or Zoom. Thank you for considering!
[YOUR NAME]
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COLLISIONS DATA: You will need a way to collect data online so you can quickly get complete and legible information from your volunteers. We recommend the iNaturalist program (see “Nitty Gritty”, Data Collection section above).
EFFORT DATA: We ask volunteers to fill out a Google Form each week to share how much time they spent surveying that week so we can track effort data. This is optional but helpful. An example of the google form is here, and it spits responses into a google spreadsheet.
BIRD REPOSITORY: You will also need a location for volunteers to deposit and store frozen birds so you can verify species at the end of the survey period. The address of the selected office or home with freezer space, along with drop off information, should be provided to volunteers.
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Ideally, you will have enough volunteers so each of the buildings in your BCC program have someone monitoring the building every single day of the week during the survey period. Volunteers can sign up for multiple days if you and they wish.
Local bird clubs, student groups, Wisconsin Master Naturalists, and community centers are great places to advertise this work.
We recommend taking registrations through a platform like SignUpGenius, which can be used for free (upgraded paid plans are also available).
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Volunteers will need to know what to do, so you will need to provide them with a training session. This can be done in person or online. See recordings of previous training sessions hosted by Southern WI Bird Alliance HERE as an example.
Volunteers also need a kit with which they can collect birds, document observations, etc. Our list of survey kit materials is found HERE. You can have volunteers make their own kits or you can assemble and distribute kits for them.
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Throughout the survey period, keep an eye on the data portal to ensure the entries include all of the required information and meet your expectations.
During the survey period, volunteers will collect dead birds, which you can gather up and identify at the end of the survey period. Identifying birds to species and making sure the species record in the database is important for ensuring accuracy of your study and analysis. You want to say with confidence that X number of Cedar Waxwings were documented, for example.
At the end of the survey period, we set a day, time and location for the bird identification activity and invite volunteers to come help. The BCC coordinator should download spreadsheets of the data in advance so they are open and ready when the bird sorting/ID begins. As birds are IDed, they can be confirmed or corrected in the database.
Any questions about the data should be cleared up with the volunteer as soon as possible. If the volunteers are logging multiple birds, waiting to correct errors may result in confusing experiences or making details harder to remember.
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One of the most important gratifications for volunteers is seeing the results of their efforts. They want to see a report in a timely fashion!
Try to clean up, organize, and analyze the data and summarize the results of the survey period within 1 month after the survey period is completed so you can share it with the volunteers and site owners. If appropriate, you can share it with the community as well, as long as it doesn’t come across as building shaming. An example of an end-of-season report is available HERE.
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You did it! You made it through a BCC survey period, connected with a variety of community members, collected important data, and closed the communication loop with your volunteers and site owners. Congratulations!
Now is a good time to plan an end of the season celebration (bird walk, pot luck, happy hour, etc.) and say thank you to your volunteers and partners. You can also give them a heads up about the next survey period’s approximate dates.
Marketing Materials you can use
Recruiting volunteers and making the issue of bird-window collisions a more commonly understood problem takes time and effort. But there’s no need to recreate the wheel! Here are some graphics, videos, and text snippets you can copy, paste, and modify for your own use.
Text in [brackets] should be edited by you!
Example social media post:
BCC volunteer photo by Terri Bleck
Join the Bird Collision Corps to make a difference for birds this [fall]!
You'll help study where birds are hitting windows in [the Madison area]—we use this data to work with building owners to find solutions for problem windows. Surveys are once a week in the mornings (before 9:30am) from [September 15 to November 1].
Learn more and sign up at [swibirds.org/bcc]
Thank you to all of our volunteers and partners! Birds are better off because of you!
Example email:
Yellow Warbler photo by Stan Lupo
Join the Bird Collision Corps
[FALL] SURVEY PERIOD: [SEPT. 15 - NOV. 1]
MADISON, WI AREA
Weekly surveys, approx. 1 hour per week
Sites include [UW-Madison, Madison College, Henry Vilas Zoo, Verona Public Library,] and others!
Volunteer today [use your link]
Window collisions are the second leading cause of bird deaths directly resulting from human activities. The good news is that this is a fixable problem, but we need your help to study where birds are hitting windows in [the Madison area].
The Bird Collision Corps [use your link] is a group of volunteer citizen scientists (that's you!) who document the locations, frequency, bird species most effected by window collisions at your program sites during migration. With the data collected, we look at which windows are most problematic and work with building owners to fix that problem. The [Fall 2025] survey period is [Sept. 15 - Nov. 1], and we're looking for volunteers.
No expertise is required. We'll provide you with all the training and materials you'll need.
We need your help!
If you're interested in joining, follow these steps:
Read more about the project: swibirds.org/bcc [use your link]
Pick which site and day you want to survey and sign up here: swibirds.org/bcc-sign-up [use your link]
Watch the training videos online at your convenience before [Sept. 15].
Survey your site once a week on the day you choose from [Sept. 15-Nov. 1].
Submit your data using the free data portal app we provide.
We'll provide you with all the training and materials you'll need. Bird Collision Corps is a great way to contribute to bird research and conservation close to home!
Learn more & sign up! [use your link]
[Fall 2025] Site Partners:
Thank you to our wonderful site partners: [American Family Insurance, Dane County Humane Society, Henry Vilas Zoo, Holy Wisdom Monastery, Madison College, Madison Parks, Thoreau Elementary School, UW Arboretum, UW-Madison, Verona Public Library, and Warner Park Community Recreation Center; additional program collaborators include the Dane County Humane Society's Wildlife Center and American Bird Conservancy.]
