The Friends of the Wilderness Park’s Annual Report for 2021-2022 is now available. Click here to see what we’ve been up to this past year.
Friends’ 2021-2022 Annual Report now available!

The Friends of the Wilderness Park’s Annual Report for 2021-2022 is now available. Click here to see what we’ve been up to this past year.
Please join the Friends of the Claremont Hills Wilderness Park on Saturday, April 30, for a Wilderness Park BioBlitz in conjunction with the City Nature Challenge
What is a BioBlitz?
A BioBlitz is a communal citizen-science effort to record as many species within a designated location and time period as possible. It’s a great opportunity to meet other naturalists, scientists, and curious members of the public to meet in person in the great outdoors and learn about the plants and animals that live in the Wilderness Park.
How will the BioBlitz work?
Observers will look for plants and animals in the Park, take a photo (or multiple) phots of an organism, and upload the photos to iNaturalist.
What is iNaturalist?
iNaturalist is an online social network of people sharing biodiversity information to help each other learn about nature. iNaturalist is a collaboration between National Geographic and the California Academy of Sciences. Anyone can participate in iNaturalist!
Before arriving on Saturday please:
Once you’ve signed up, you can enter observations from either your phone or computer.
Can I get help in learning to use iNaturalist?:
Yes, indeed! If you’re new to iNaturalist and would like instruction or training on how to use the app, two great opportunities coming up just in time for the BioBlitz:
Are guides or tutorials available for people who cannot attend an iNaturalist training event?
How do I add my observations to the BioBlitz record?
You don’t need to do anything to add your observations to the BioBlitz record. All observations made in the Park on the BioBlitz day will be automatically collected and added to the City Nature Challenge and Biota of the Wilderness Park projects.
How does one sign up for the BioBlitz?
You can sign up here or you can register at the Park. You can also make observations without signing up, but if you sign up, you’ll get a report of the results.
Thanks to everyone who participated in California Biodiversity Day at the Wilderness Park on September 11, and thanks to the Park Rangers, who set up their canopy for us! During the official California Biodiversity Days, Sept. 4 – 12, seventeen new observations were reported to our iNaturalist project, including 14 taxa, of which 11 were identified to species.
Here are a few that were observed:
Telegraph Weed (Heterotheca grandiflora)
Telegraph Weed was the species most commonly reported in the Park during California Biodiversity Days. Its bright yellow flowers on tall stems (sometimes more than 5 ft) are a common sight in the Park in late summer and fall. It is a pioneer native species, growing along roadsides and in other disturbed sites.
The origin of the common name is hazy. Some think it’s because the tall, slim stalks stick up like telegraph poles. Others have suggested it’s because it readily colonized the areas disturbed by telegraph pole installation.
Threadleaf Groundsel (Senecio flaccidus)
Another late summer and fall bloomer, Threadleaf Groundsel’s bright yellow daisy-like flowers rise about the mass of pale gray-green threadlike leaves that give the shrub its common name. Many different bees like to visit Threadleaf Groundsel.
Small Carpenter Bee (Ceratina sp.)
Small Carpenter Bees are related to the large carpenter bees you may have seen around your house, but they are much too small to be able to bore into wood to make their nests; instead they make their nests in the pithy stems of plants.
Woodland Skipper (Ochlodes sylvanoides)
Woodland Skippers are common in chaparral in the late summer and fall. The larval host plants are grasses, but the adults nectar on a wide variety of plants.
You can see all of the Biodiversity Day observations here.
September 7, 2021 marks the third official celebration of California Biodiversity Day, an annual event created in 2018 to celebrate the state’s exceptional biodiversity and encourage actions to protect it. This year organizations throughout the state are hosting California Biodiversity Day events from September 4 to September 12, 2021, and the City of Claremont Park Rangers together with the Friends of the Wilderness Park be celebrating in the Claremont Hills Wilderness Park on the morning of Saturday, September 11.
Join us on Saturday morning, September 11th and learn how to use your phone to record observations of Wilderness Park flora and fauna with iNaturalist! Just look for the canopy near the North Mills entrance for more information! All iNaturalist observations made in California from September 4 – September 12 will automatically be added to the California Biodiversity Day 2021 iNaturalist project.
Already an iNaturalist user?
Please come and help show others to use the iNaturalist app! Contact Vicki Salazar, our Volunteer Coordinator, at vickisalazar01@gmail.com, to let her know when you will be able to come. (Please note that all Friends of the Wilderness Park volunteers are required to be fully vaccinated for COVID-19.)
New to iNaturalist?
iNaturalist is an online social network of people sharing biodiversity information to help each other learn about nature. iNaturalist is a collaboration between National Geographic and the California Academy of Sciences. Anyone can participate in iNaturalist!
Before arriving on Saturday please:
Once you’ve signed up, you can enter observations from either your phone or computer. The iNaturalist site has a really good explanation here:
https://www.inaturalist.org/pages/getting+started
The page also has links to video tutorials.
In addition, we have two printer-friendly handouts created from the iNaturalist guide:
The Wilderness Park Biota Project:
In addition to the “California Biodiversity Day” project, any observations you make in the Wilderness Park (at any time) will be automatically added to the “Biota of the Claremont Hills Wilderness Park” project. This project was created by the Friends of the Wilderness Park specifically for documenting the plants and animals of the Wilderness Park.
If you’d like to check out the CHWP project and see what’s already been reported, just go to:
https://www.inaturalist.org/projects/biota-of-the-claremont-hills-wilderness-park
A few tips for best practices:
The City of Claremont has lifted the restrictions that prevented the Friends from holding Second Saturday events in the Park. We had a “soft open” with a few volunteers on July 10, when we were visited by Claremont Mayor Jennifer Stark, and a regular Second Saturday event on August 14.
The second Saturday volunteer program is a collaboration of the Friends of the Wilderness Park, CHWP Rangers, and City Staff. On the second Saturday of each month, for four hours Friends’ volunteers:
We are always looking for volunteers for Second Saturday, so if you’re interested, please contact our Volunteer Coordinator, Vicki Salazar at vickisalazar01@gmail.com, or if you’re in the Park, stop by and say, “Hi”.