Posts Tagged ‘Oracle Road wildlife bridge’
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).
Thanks to all of our supporters and volunteers for another year of successful wildlife camera monitoring in the Tucson Mountains and Oro Valley study areas! See an overview of our Tucson Mountain camera project results HERE and our Oro Valley camera project results HERE.
We have been monitoring wildlife with wildlife cameras in the northern portion of the Tucson Mountains and Avra Valley for four years. To date we’ve seen over 30 species across 23 camera sites, data which helps inform our I-11 work and knowledge about the Tucson-Tortolita Mountain Wildlife Linkage. Javelina have been photographed most frequently, and it is good to see these native seed dispersers out and about! Other notable results in the last year include more badgers, and bobcats with kittens in tow.
In Oro Valley, we have been monitoring east and west of the Oracle Road wildlife bridge and underpass for a total of seven years! We now have excellent comparative data pre- and post- construction of the crossings that were built in May 2016. With 62 species across 49 camera sites (and nearly 78,000 photos!), we are seeing lots of cottontails and quail that are plentiful prey for coyotes, bobcats, and gray foxes. We’ve seen white-nose coati and bighorn, and our resident female mountain lion has appeared again this year several times just west of the wildlife bridge.
We will post more detailed results as we finalize project reports and dive into the fun and useful information these cameras have in store!
Want to learn lots of interesting facts about the Sonoran Desert’s mule deer? Check out CSDP Conservation Science Director Jessica Moreno’s latest column in the Desert Leaf magazine. In this article, titled “Mule Deer Constellations,” Jessica follows the journey of one mule deer that was collared by the Arizona Game and Fish Department as part of the larger monitoring study of the Oracle Road wildlife crossings. Check out the article HERE to learn more about where this mule deer travels!
The full issue of the Desert Leaf can be found HERE.
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 Saturday, April 27, a new show on NBC, “1st Look,” aired a segment after Saturday Night Live about the Coalition and our work on the Oracle Road wildlife crossings. Coalition Conservation Science Director Jessica Moreno spent a long day in the field with the crew and host of the show, Johnny Bananas, in mid-March showing them the Oracle Road wildlife crossings, looking for a collared mule deer, tracking down a tortoise outfitted with a radio telemetry device, showing off one of our wildlife cameras, and more. Scientists from Arizona Game and Fish Department joined us for part of the day, along with Coalition volunteer and superstar Kathie Schroeder and her hawk Sueño. You can view the full 6-minute segment HERE or by clicking on the image below.
And a huge thank you to all our community science volunteers and supporters that have been instrumental to this project and volunteer program!
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!
CSDP Conservation Science Director Jessica Moreno published a new article in the most recent edition of the Desert Leaf magazine. Jessica’s article provides a fantastic summary of the history of wildlife linkages protection in Pima County’s Sonoran Desert, along with anecdotes and reflections on both black bears and Sonoran Desert tortoises and why they both need connected wildlife linkages to thrive.
Like black bears, tortoises have plant-based eating preferences. They also have few natural predators, can roam with compass-like precision and determination over hundreds of miles, and hibernate in the cold months. Tortoises get most of their water from the plants they eat, carrying it in canteen-like bladders. (Handling a tortoise can cause it to become anxious, pee, and thereby lose an entire summer’s water supply.) Roads and development are perilous hazards for them. But with thoughtful planning and community support, the threats posed by these hazards can be reduced or eliminated. In addition, safe crossings and open spaces benefit more than fuzzy bunnies, tortoises, and bears; they provide a beautiful, thriving, and resilient place for us to live.
The full article is available here.
And the full issue of the Desert Leaf magazine can be found at this website.
Great work, Jessica!