Posts Tagged ‘SR77 wildlife crossings’
Want to learn more about what’s happening around the Oracle Road wildlife crossings? Check out this recent presentation given by our Conservation Science Director Jessica Moreno:
You can also view a pdf of the presentation HERE.
by Jessica Moreno, Conservation Science Director
The last time I took a stroll down Big Wash, which runs along the west side of Oracle Road, the chill air pressed against my face mask but still managed to carry the smell of triangle leaf bursage and creosote. Gambel’s quail scurried away with their bustling chip-chip-chip alarm call. Dry for most of the year in that characteristic way our desert washes are, Big Wash has served as a connection for animals moving back and forth between the Cañada del Oro Wash and open space north of Rancho Vistoso. It has always been an important wildlife movement area, a key feature in a linkage connecting the Tortolita and Catalina mountains, and now, with two wildlife crossings in place and wildlife monitoring efforts nearing a decade milestone, we are learning more every day about the habits and movements of animals that often remain just out of sight.
Five year ago, when the wildlife bridge and underpass were built on SR77, the red ribbon was cut, the first critter crossed, and we celebrated. But the work wasn’t quite over. In addition to wildlife monitoring, Phase II of the project was to finish placing the last sections of wildlife funnel fencing. Wildlife fencing is an essential part of every successful wildlife crossing and is a vital component of this project to both effectively reduce wildlife-vehicle collisions and maintain a connected landscape for wildlife populations and gene flow. But a few jurisdictional issues and challenges to fencing placement threatened to hold up the whole project, so the decision was made to complete the difficult pieces after the crossing structures were done. Arizona Game and Fish Department’s roadkill surveys confirmed hotpots associated with these fencing gaps. It was a problem, but addressing it had to be done right.
One of these fencing gaps was on either side of the wildlife underpass, at the Rancho Vistoso neighborhood of Vista Mirabella. We placed wildlife cameras to monitor the gaps and reached out to the residents and the HOA to help solve the problem. The solution, made possible thanks to the leadership of the Town of Oro Valley and the wise suggestion of one of the residents, is an elegant one. And it may very well be the first of its kind for wildlife exclusion: wildlife fencing connected to the sound wall will close the gaps at the north and south ends of the neighborhood, while specially designed automatic gates will secure the neighborhood entrances.
This is a unique circumstance since these are public streets and the gates, which are designed like a gated community entrance, will open to any approaching vehicle. They are planned to remain open during high volume traffic hours and close at night. The Regional Transportation Authority is covering the cost out of remaining funds from the original crossing construction budget, including re-vegetation and projected maintenance, and Oro Valley is taking responsibility to maintain the gates into the future.
After four years of outreach and problem solving as a community, we hope that construction on this final piece of the puzzle will begin this summer. There are still details to figure out, but light is at the end of the tunnel and the end result, I think, is something everyone can be proud to have taken part in.
A big thanks to Coalition volunteers Pat and Henry Miller for their help in monitoring the fencing gaps and their overall involvement in this project! And thank you to the Regional Transportation Authority, Pima County, the Town of Oro Valley, and the Arizona Game and Fish Department for your shared persistence in this project.
More information about this project can be found in a Power Point presentation recently created by the RTA and the Town of Oro Valley.
Arizona Game and Fish Department (AGFD) just released the latest and greatest monitoring data from the Oracle Road wildlife overpass and underpass. This represents FOUR FULL YEARS of monitoring these wildlife crossings since construction finished in March 2016.
Some notable data and results include:
- 26 different species have been observed using the crossings, including 11 species at the overpass and 25 species at the underpass.
- Over 10,000 wildlife crossings have been documented by AGFD cameras – 10,843 to be exact. These crossings are fairly evenly split between both structures, with 5,490 crossings at the overpass and 5,353 at the underpass.
- Over 98% of the crossings are by four species: mule deer, javelina, bobcat, and coyote.
- Total crossings at each structure have increased year upon year since construction finished. This means each year more and more wildlife are using these wildlife crossings.
For more results, you can read the full monitoring report HERE.
To learn more about why these crossings were built, how they were funded, and more, head over to the following webpages:
- Oracle Road Wildlife Crossings Overview
- Wildlife Results: It Works!
- The Big Picture: Tucson-Tortolita-Santa Catalina Mountains Wildlife Linkage
- Oracle Road Wildlife Crossings: Frequently Asked Questions
The Oracle Road wildlife crossings were recently featured on TV station FOX10’s Drone Zone segment in Phoenix. Check out this 3+ minute segment to see some amazing drone footage of both the Oracle Road wildlife underpass and overpass, along with a great interview of our partner Jeff Gagnon with the Arizona Game and Fish Department (click on the image/link below to access the full TV segment).
In March 2019, the Arizona Game and Fish Department (AGFD) released their latest monitoring results from the Oracle Road wildlife crossings. AGFD typically releases monitoring results twice a year so we should have an updated monitoring report sometime this fall.
Two summary graphs from the report are highlighted below:
Want to learn more about the Oracle Road wildlife crossings, why they are located where they are, how wildlife know to use them, how they were funded, and much more? Our website includes:
On May 12, 2019, CSDP Executive Director Carolyn Campbell was interviewed by Amanda Shauger for the “30 minutes” program on local community radio station KXCI 91.3 FM. Over the half-hour show, Carolyn and Amanda discuss the history of the Coalition, the Sonoran Desert Conservation Plan, and what we’re working on these days. Topics covered include how and why the Sonoran Desert Conservation Plan came to be, protecting Sonoran Desert wildlife linkages, our fight against the Rosemont Mine and Interstate 11, our Critter Cam program, and more!
The full show can be listened to at:
Thanks for all your support over the last 21 years!
A new interactive case study about the Oracle Road wildlife crossings was just launched through the work of the Desert Landscape Conservation Cooperative. This case study features both a 2-page summary and an interactive map with more detailed information. You can check out the case study at https://arcg.is/09arn8 or look at it in the box below. [In the box below, click on the blue left and right arrows at the bottom to access the different sections of the case study. Within each section, click on the blue “i” in the top right corner to read the narrative about each section.] And thank you for all your support for this innovative project!
by Jessica Moreno
It was a clear, crisp day on March 6, and the freshly brewed coffee was almost as invigorating as the arrival of several school bus-loads of fourth graders and parents from Manzanita Elementary. Over 100 curious minds boiled out into the lower parking lot of the Santa Catalina Catholic Church on Oracle Road just south of the wildlife bridge. “Critter Cam Day” had arrived.
Coalition volunteers were already stationed around the seven activity tents laid out around the parking lot, as kids split into organized groups led by teachers Charlotte Ackerman and Jennifer DeBenedetti of the Manzanita Robotics Club. These students have been sorting and studying the Coalition’s wildlife camera photos as part of a new 4-week curriculum developed by Ackerman and DeBenedetti in partnership with CSDP. Today, they would have a field day.
It may not be surprising that the activities held their rapt attention and their colorful field guides, made especially for this day, were quick to be filled. Finely timed rotating activities included a spotting scope station to view the wildlife bridge and mapping points of interest. Mark Hart with Arizona Game and Fish Department taught wildlife tracks and track tracing skills. Wildlife rehabilitator and CSDP volunteer Kathie Schroeder and her outreach hawk Sueño shared the adaptations of Harris’s hawks and other birds of prey. Mr. Packrat brought a guest too – and shared the desert adaptions of native packrats. Stations also included games and activities to teach camouflage techniques and the importance of pheromones and scents. And of course, the day would not be complete without a guided nature walk to check a wildlife camera!
Throughout the morning, students and parents were absorbing the skills and knowledge of naturalists and scientists and giving back a thirst for more. As we met around the leftover coffee and homemade granola bars after the day was done, teachers, volunteers, and guest contributors all agreed that very few improvements could be made to this positive and inspiring day. The success of this event is something we hope to repeat, and expand next year. Eventually, we hope this will be a curriculum that can be packaged and adopted by other TUSD schools. Not unlike the critters now crossing new bridges, these students are poised to bridge the divide between knowing – and doing.
Read the latest story about Critter Cam Day in the Oro Valley Explorer, here.
Check out this fantastic video about Critter Cam Day produced by the Catalina Foothills School District:
Emerging issues with the Oracle Road wildlife crossings create opportunities for stronger community connections.
by Jessica Moreno
Once a wildlife crossing is built, the project still isn’t done. CSDP has remained actively involved with the wildlife bridge and underpass project on Oracle Road since its completion, helping to install educational signage, planning re-vegetation and erosion control, engaging on emerging issues like motorized use and other encroachments, and, of course, monitoring changes in local wildlife. For little over a year, we have also been focusing on building a stronger connection with the local Rancho Vistoso HOA and with the roughly 60 homeowners living near the crossings. Javelina, coyotes, desert tortoise, and a myriad of smaller wildlife have been slipping through gaps in the wildlife-funnel fencing, resulting in a two-mile plume of roadkill extending south of the underpass on Oracle Road. These open gaps are the cul-de-sacs and drainage areas within the underpass’s adjacent HOA neighborhood, where animals can access the street and bypass the wildlife underpass. While the idea of wildlife fencing in the neighborhood is understandably undesirable for most homeowners, we have been slowly coming together to find solutions and a compromise that works for all.
With some exceptions (there are always a few), wildlife are excellent neighbors. Quiet, shy except around the bird feeder, we mostly don’t even see them unless we make an effort to look. Yet they provide us with spontaneous joy when do catch a glimpse. The therapeutic hum of tiny wings at the feeder during a spring rain and the bright-eyed peaceful stare of a deer in the chill morning can make time stand still. Wildlife watching from our yards and community areas is part of why many of us choose to live here. According to a 2011 report conducted by the Tucson Audubon Society, in Pima County alone wildlife watching supported more than 2,700 jobs, and directly produced $19.8 million in local and state tax revenue from over $179 million in wildlife watching related spending. In one year! It’s nice to know that the pollinator plants and binoculars I bought contribute to a thriving economy, but I’m just as happy to see the tracks of the local bobcat when I go for stroll in the evening and to add another hummingbird to my yard list.
It is also good to know that our wildlife crossings on Oracle Road are working wonderfully, with mule deer, javelina, bobcats, coyotes, and more using them regularly. That investment has truly paid for itself, by supporting local wildlife watching opportunities and by reducing the taxpayer and personal costs of wildlife-vehicle collisions. There have been over 2,900 animal crossings on the bridge and underpass recorded to date, and – where the wildlife funnel-fencing is complete – roadkill is down to near zero. After the surprise of tortoises and bighorn sheep last season, one of the local homeowners photographed a beautiful badger (local nighttime rodent control, at your service) near their home west of the wildlife underpass in early February. We now have evidence of badgers on both sides of the wildlife crossings, and neighbors are sharing their sightings and their stories.
Here where people and nature encroach upon each other, finding balance can be challenging. The peaceful gaze of a deer tells me that the return in our investment, and the reward, is well worth some compromise. As wildlife adapt to their changing landscape, we can continue to enjoy their presence and strive to be a community of good neighbors in return. By bringing the community together as part of the process, we all share in that success.
by Jessica Moreno
It was chilly outside in Flagstaff, AZ this February, when we presented our most recent wildlife camera results at the 2018 Joint Annual Meeting of the Arizona and New Mexico Chapters of the Wildlife Society. Inside, the conference rooms were toasty warm – and when our Programs Manager Sarah Whelan took the stage it was to a packed house. Professional biologists and students of wildlife from across two states were there to hear her 15-minute presentation on “Monitoring the Effectiveness of Wildlife Crossings in a Rapidly Developing Sonoran Desert Ecosystem.” In addition to the data and scientific process, Whelan highlighted the citizen science component and community engagement that made the project so successful. The two proceeding talks were led by well-respected wildlife corridor gurus Dr. Paul Beier, and Norris Dodd! We were in grand company. Also at the conference, we co-hosted a day-long workshop on wildlife camera monitoring, training participants in camera deployment strategies, study design, and sharing image management software resources.
Our full abstract can be read below:
Monitoring the Effectiveness of Wildlife Crossings in a Rapidly Developing Sonoran Desert Ecosystem
The Tucson-Tortolita-Santa Catalina Mountains wildlife linkage in Tucson, Arizona is one of the most threatened in the state. In response, Pima County and partners constructed a large wildlife bridge and a wildlife underpass across State Route 77, which bisects the linkage, in 2016. The Coalition for Sonoran Desert Protection is supplementing Arizona Game and Fish Department’s four-year post-construction monitoring efforts with a pre- and post-construction wildlife camera participatory research monitoring study, focusing primarily on mammal species. Our objective is to develop a baseline and monitor changes in species richness and wildlife activity patterns in the study area. In addition, the project’s goals include close collaboration and data sharing with partners, and to engage and train local residents as citizen scientists. We are using the data management and analysis protocols developed by Sanderson & Harris 2013. To date, we have collected 3 years of pre-construction data and two years of post-construction data, with 41 cameras deployed throughout the linkage, including 11 cameras at the wildlife crossing approaches, monitored and managed by 56 citizen science volunteers. No bait is used. We found 44 species, including notable records of American badger (Taxidea taxus), white-nosed coati (Nasua narica), and desert bighorn (Ovis canadensis nelson). Preliminary results also suggest increased mule deer (Odocoileus hemionus) activity west of the crossings post-construction. We continue to gather data to help inform adaptive management needs as wildlife fencing gaps are addressed, and to highlight the effectiveness of wildlife crossings in a rapidly developing Sonoran Desert ecosystem.