Colorado
Searching for Colorado’s little-known fireflies
Banner image: Fireflies dance over a field near Sawhill Ponds in Boulder, Colorado. (Credit: Peleg Lab)
Owen Martin steps carefully through the knee-high grass growing up around a long-abandoned railroad track near Sawhill Ponds in Boulder, Colorado. It’s almost pitch black out. The sun set 45 minutes ago, and the only light now comes from the distant buzz of cars on Valmont Road.
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Students, Colorado residents and more can sign up to help record firefly flashes.
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Or almost the only light. If you let your eyes adjust to the dark, you can just make out the twinkle from hundreds of faint specks. They flash on and off as if someone spilled yellow-green glitter across this empty field.
Martin, a doctoral student in computer science at CU Boulder, is hunting for fireflies.
“There’s one right there,” he says, holding up a butterfly net. “It’s leading me on a little chase.”
Many people who call Colorado home might be surprised to learn that fireflies (or lightning bugs, depending on who you ask) also live in the state. But, if you’re lucky, you might stumble on a few pockets of these insects lighting up the night. You just need to know when and where to look.
That’s what Martin and his advisor Orit Peleg are trying to figure out now. In a project that blends technology with natural history, researchers in Peleg’s lab have spent summers since 2018 traveling across the state in search of fireflies. They use 360-degree cameras to learn more about the insects, including the patterns they make with their flashes. In many ways, the team is in a race against time. In Colorado, as in other places around the world, firefly populations may be vanishing as a result of humans paving over wetland habitats and saturating the night sky with artificial light.
“Firefly flashes are like a little, secret language,” said Peleg, associate professor in the BioFrontiers Institute and Department of Computer Science. “They are very special, and we have a lot to learn from them.”
Introducing Colorado fireflies
It’s a new experience for Martin. The researcher grew up not far from this natural area in Louisville, Colorado, but had never seen a firefly at home until three years ago. He said that observing these animals in the wild is a “wonderous feeling.”
“It’s all dark, and you feel like the rest of the world isn’t there anymore,” he said. “You feel like you are floating in space, and there are all these stars moving around you.”
A male Photuris firefly coated in pollen sits on a thistle plant near the Boulder Reservoir. (Credit: Owen Martin)
Owen Martin uses a red light to examine a firefly in the field. (Credit: Owen Martin)
At Sawhill Ponds, he’s trapped one of those stars now. He gingerly moves the insect from his canvas net to a covered petri dish. The firefly is about a half-inch long, and you can just make out its orangish head and black wings. A light organ on the bug’s abdomen glows, flashing like the beacon from a lighthouse.
Fireflies belong to a family of beetles known as Lampyridae, and roughly 2,000 species of fireflies can be found across the globe. It’s not clear how many live in Colorado. The insects near Sawhill Ponds belong to a common genus called Photuris. The name roughly translates to “light terror” because female Photuris fireflies sometimes use flashes to lure in, then devour males from different species.
Entomology collections at the CU Museum of Natural History include specimens from Photuris and four other genera found in 19 Colorado counties—ranging from Yuma County in the northeast to Montezuma in the southwest. Martin himself has observed fireflies in the town of Divide, which sits near Pikes Peak at an altitude of more than 9,000 feet.
Still, there are good reasons why these luminous animals remain such a mystery in the state. Unlike fireflies in the eastern U.S., which can abound all summer long, Colorado fireflies tend to cluster in swampy areas and are active for just a few weeks per year—appearing in the second half of June, then disappearing again by mid-July. Martin’s research is supported through the President’s Teaching Scholars Program and Timmerhaus Fund Ambassadors at the University of Colorado and by the City of Boulder Open Space and Mountain Parks.
“A lot of people here come from places like the Midwest where they’ve seen fireflies. But they don’t know about them in their own backyards,” said Martin, who wants to raise “firefly literacy” in the Front Range.
Speaking firefly
Part of that goal hinges on understanding their secret language, Peleg said.
She explained that male fireflies flash to attract females, which often remain hidden on the ground. Each firefly species, however, has its own, unique flash pattern.
“It’s like Morse code,” she said. “It’s this simple light on, light off signal, and that’s probably as close as it gets to computer language, ones and zeros, in the animal kingdom.”
To explore those patterns, her team uses 360-degree GoPro cameras to record fireflies in the wild. They then feed those recordings into computer programs that analyze the patterns. In recent research, for example, the group dug into the flashing behavior of fireflies in the Great Smoky Mountains of Tennessee—where thousands of insects synchronize their displays so that they all flash in unison, bathing entire hillsides in light.
Peleg’s team found that these animals seem to achieve that feat by observing how their neighbors are flashing, then adjusting their behavior to match.
Martin is gathering similar insights into Colorado’s fireflies. Eventually, he and Peleg want to build a library of firefly flash patterns—a sort of Google Translate for insects. That way, people could record video of fireflies flashing, then automatically identify what species they’re looking at.
Protecting diversity
The researchers hope they can collect their data before it’s too late.
How you can help fireflies
Coloradans can help protect fireflies by following these tips from the Butterfly Pavillion:
- Support land conservation and habitat restoration.
- Stay on designated paths when visiting natural areas to avoid damaging their habitat.
- Enjoy fireflies in the wild and don’t catch them.
- Turn off unnecessary lights near their habitats in June through August.
Across the globe, research on fireflies remains scarce. But a growing number of hints suggests that some species may be disappearing.
In Colorado, artificial light is a major threat. Studies of fireflies from the eastern United States show that streetlights and other nighttime illumination can wash out the signals that fireflies are trying to communicate. It’s a bit like trying to carry on a conversation in the middle of a crowded bar. (Such “light pollution” can also make it more difficult to see the stars from Colorado).
But there are a number of actions people can take to protect vulnerable firefly habitats. Martin and Peleg invite curious Coloradans to volunteer to help out with the research project. A team at the Butterfly Pavillion near Denver is also raising adult fireflies from larvae, which could one day be released into the wild.
The potential of those actions is on display at Sawhill Ponds. There, a strange light has caught Martin’s attention. It’s a firefly, but one with an oddly orange-colored light.
After a few swipes of his net, the scientist captures the mysterious insect. It’s noticeably smaller than the Photuris bug he caught earlier. It’s a Pyractomena, a completely different firefly genus and one Martin has not recorded at this spot before.
“This could be very exciting,” he says.
The new insect is a reminder that scientists still have a lot to learn about fireflies in Colorado. Martin encourages everyone to get out and look.
“Turn your lights off,” he said. “Then, between the middle of June and the middle of July, try to take some walks at night in your local wetland areas and see if you can find some.”
Colorado
Colorado county and city team up to address local food accessibility
To improve food access and build a healthier community, Boulder County, Colo. Public Health’s Healthy Eating, Active Living (HEAL) team collaborated with the city of Boulder on its comprehensive plan. The HEAL team analyzed best practices in nutritious food access and sustainable agriculture in comparable communities across the nation to help inform its recommendations for city planning, according to Amelia Hulbert, Boulder County Public Health’s Healthy Eating, Active Living (HEAL) lead.
“A comprehensive plan is visionary, it’s long range,” Hulbert said. “It should not just be a document that fits on the shelf and doesn’t get used, so when you have the opportunity to either create something new or update it, how do you make sure it [outlines] goals and policies that are going to support the work that you know needs to happen?
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Boulder County’s “Improving Food Access and Health for Boulder Residents Through Municipal Comprehensive Planning” initiative was the 2025 NACo Achievement Award “Best in Category” winner in Planning.
“We wanted a place to specifically call out public health priorities, so when it came time to talk about allocating funding or anything like that, we can point to it and say, ‘As a county, we said that food access is important. We said that air quality monitoring is important.’”
When starting the process of creating the city’s comprehensive plan, City of Boulder staff reached out to the state health department looking for subject matter expertise on food access, which is how the HEAL team got involved, Hulbert said.
“I think there’s this through line of ‘planners are planners, and they’re usually not subject matter experts,’” Hulbert said. “And so, when they seek out subject matter expertise, how can we make sure those connections can easily be made to people in their own community who are going to not only know the content, but know the issues? I think it’s a cool process, and others could totally do the same thing.”
The HEAL team analyzed comprehensive plans from a dozen municipalities like Boulder, including Ann Arbor, Mich.; Asheville, N.C.; Burlington, Vt. and Provo, Utah. Factors considered when choosing the municipalities included population size, economic and demographic makeup and communities with a mix of urban, suburban and unincorporated rural land, according to Hulbert.
Olivia Ott, a Centers for Disease Control and Prevention (CDC) Public Health Associate working with the HEAL team, identified 34 model policies from the plans and categorized them into five themes to compare against the City of Boulder’s existing plan: healthy food access, sustainability, built environment, equity/culture and local agriculture.
“We’re usually looking to a couple key cities across the nation that we would consider cutting edge and innovative,” Hulbert said. “So, we just applied that methodology to something very specific, of digging into, ‘How are their plans structured? What are they saying?’ And then thinking about, ‘Does it make sense for our community?’ And then [assessing] ‘What are other things that are really specific to our community?’”
Factoring in the identified best practices, Ott scored the city’s plan into three categories: “Present” in Boulder’s current plan, “Somewhat Present” and “Absent.”
“That kind of grading system actually worked really well, and it really resonated with the planning team,” Hulbert said. “You could tell that they were like, ‘Oh my gosh, we’re doing really well here.’ And then, it was really specific, of ‘Hey, other people are talking about this one thing, and you all aren’t.’ I think it was just put in a way that they could really absorb.”
The HEAL team’s research and recommendations were presented to the Boulder and Broomfield County’s Food Security Network (BBFSN), a community group made up of people with lived experience of food insecurity and organizations that serve food insecure individuals, that were providing input on the city’s comprehensive plan. The HEAL team’s findings helped inform the BBFSN’s recommendations to the planning department.
While the HEAL team had the expertise and staffing to do the research, it was “critically important” to then integrate community engagement with the BBFSN into the work, Hulbert noted. Final recommendations for the city plan from the BBFSN address food access through six different categories: transportation, land use, housing, climate, economic development and food systems.
“We did what was within our wheelhouse, and then we knew that there was another group who has a totally different wheelhouse, so it was how could we then pass off what we’ve done and have them take it a step further?” Hulbert said. “Because I think what they brought is more of that lived experience community storytelling. Olivia can say, ‘It’s important to emphasize culturally relevant foods.’ And then there’s likely a community member that can actually give real voice to that and why that matters.”
Colorado
Families, care providers navigate cuts to Colorado’s Community Connector program | Rocky Mountain PBS
“Typically, between me and my husband, there are no breaks. We have to constantly ask each other to change him and feed him and shower him. I always worry about the future if Elli has to leave and not get help anymore,” said Dina Katan, Batikha’s mother. “The free time is good for my mental health. For me, when Elli comes here and helps, I have time to do things that usually I am not able to do.”
Other parents are concerned that the reduction in hours will make it harder to find care providers. Becky Houle of Greeley is the mother of Hadley, a 13-year-old diagnosed with Angelman syndrome, a rare neurogenetic disorder that causes significant developmental delays and little to no speech.
Hadley used to qualify for 10 Community Connector hours a week and is now down to five, Houle said. With those hours, she previously played unified basketball, went to the park and interacted with others and participated in running errands with her caretaker.
“I worry that the person that provides some of that caregiving role for her won’t be able to commit with such few hours,” Houle said. “I like Hadley to have interactions without us being there, so she can feel like a teenager.”
Tom Dermody, chief budget and policy analyst for Colorado’s JBC, said spending on Community Connector services has risen substantially over the past six fiscal years.
Dermody said that as the program, which started in 2014, has become more popular, costs have ballooned. He said participation in the Community Connector service has increased by 510% since fiscal year 2018-2019, and that annual spending has risen from about $5 million in fiscal year 2018–2019 to more than $66 million in fiscal year 2025–2026.
To cut costs, the JBC not only capped annual hours for the service, but also revised the rules to narrow what qualifies as Community Connector hours. Jane said this makes it harder to consistently reach the five-hour weekly allotment.
“When these changes were made, I did our usual Community Connect on Sunday. After I worked my shift, I noticed that I couldn’t clock in or out because my shift was removed from the app,” Jane said.
After sending an email to her employer, her agency told her that what she did — taking her Batikha to a gas station and showing him how to ask an associate how to find a product — does not qualify under the new Community Connector rules.
Under the updated rules, Community Connector hours must be tied to activities in the community that align with a person’s care plan and build skills or participation, such as volunteering, attending enrichment classes or going to the library alongside peers without disabilities.
The state has excluded simple supervision, passive outings and activities typically considered a parent’s responsibility from qualifying for Community Connector hours. Providers must now clearly document how each hour supports a specific goal.
“It’s unfair that they cut those hours for these kids and they are very strict about how we use those hours,” Katan said. “The new requirements are very specific and not inclusive of high needs kids like Taym.”
Batikha requires full support whenever he goes out, Jane said, and the stricter requirements make it harder to plan weekly community trips.
“He needs hygiene changes. He needs to be fed every two hours. And he can’t be fed anywhere. I want to give him privacy for his feeding,” Jane said.
She now plans to split her five Community Connector hours over the course of a week instead of providing them all on Sundays, as she previously did.
“I care about him and I love my clients so much, so I’m definitely going to stay,” Jane said. “His parents need the time to be able to watch a movie and not worry about if their son is okay.”
Colorado
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