California Biodiversity “Day” in the Wilderness Park, September 8–13!

All of you who love the biodiversity of the Claremont Hills Wilderness Park, get out your smart phones or cameras, come to Park on September 8–13, and post your photos of Park flora and fauna to iNaturalist to celebrate California Biodiversity Day 2020!

California Biodiversity Day was established in 2018 to mark the launch of the California Biodiversity Initiative. This annual event, which normally occurs on September 7, celebrates our state’s exceptional biodiversity, while also encouraging actions to protect it.

This year, however, is not quite a normal year, and events – most of them virtual – are happening from September 5 to September 13. Since the Wilderness Park is closed from September 4–7 because of excessive heat and elevated fire weather conditions, we will be celebrating in the Park from September 8–13.

As a COVID-19 precaution, group activities are currently not permitted in the Park, so the Friends will not have a tent, handouts, or helpers in the Park, like we did last year, but you are encouraged to go out on your own or with members of your household.

All observations you make on September 8–13 (even if you post them later) will be added both to the state-wide California Biodiversity Day 2020 BioBlitz and to the Biota of the Claremont Hills Wilderness Park.

If you’d like instructions and best practices for using iNaturalist, check out our post from last year.

And don’t forget to wear your mask and maintain social distancing. For more information, check out the City website.

Endangered Species Day May 15!

May 15, 2020 is Endangered Species Day, and we’re highlighting Endangered Species in the Wilderness Park – Nevin’s Barberry (Berberis nevinii), which is listed as Endangered by both the State of California and US Fish & Wildlife, and Crotch’s Bumble Bee, which is a candidate for Endangered Species listing in the state of California.

Nevin’s Barberry (shown above) is an evergreen shrub with prickly leaves bearing bright yellow, sweetly scented flowers in the early spring, followed by red-orange berries. Many bees and wasps love its flowers.

Crotch’s Bumble Bee (Bombus crotchii) could be confused with the much more common Yellow-faced Bumble Bee (Bombus vosnesenskii), but it’s face is black, and the yellow stripe on the abdomen is wider and closer to the thorax.


If you are out in the Wilderness Park, and spot any rare or endangered species, please let us know by emailing If you are an iNaturalist user, please post any photos to iNaturalist, but do also email us. Because iNaturalist obscures the location, the sighting won’t appear in our Wilderness Park project (

For more information on Endangered Species Day and what you can do to help Endangered Species, see:

New Bike Repair Station at the Wilderness Park!

Thursday, December 12, saw the ribbon-cutting ceremony for a new bicycle repair station at the Wilderness Park!

Made possible by a generous donation by the Claremont Rotary Club, the bike repair station is located right next to the bike stands at the Park entrance.

The Dero Fixit repair station includes all the tools necessary to perform basic bike repairs and maintenance, from changing a flat to adjusting brakes and derailleurs. Bikes can hang from the arms of the stand, allowing the pedals and wheels to spin freely while making adjustments. Attached by strong cables to the inside of the strand are essential bike repair tools – Philips and flat head screwdrivers, Allen wrenches, box wrenches, and tire levers – are securely attached to the stand with stainless steel cables and tamper-proof fasteners. Next to the stand is an air pump so Park cyclist can keep their tires topped up and ready to roll.

Claremont Mayor Larry Schoeder presents a Certificate of Appreciation to Rotary Club President Cameron Troxell.

Frec_Cervantes_Tom_Shelley-121219-6222Fred Cervantes, Parks & Sports Coordinator for the City of Claremont (left) stands next to the repair station with Rotarian and Park Ranger Tom Shelley, who was instrumental in obtaining the donation.

Rotary Club President Cameron Troxell with the Certificate of Appreciation.

The Plaque on the base of the repair station.

California Biodiversity Day at the Wilderness Park

Thanks to everyone who participated in California Biodiversity Day at the Wilderness Park, and especially the Rangers, who set it all up!  On Saturday and Sunday, Sept. 7 and 8, forty-eight new observations were reported to our iNaturalist project.  Thirty-seven different species were reported, including 13 species not previously reported to iNaturalist for the Park.  Here are a few of our favorites.  The ones with * are new species for our iNaturalist project.

*Lorquin’s Admiral (Limenitis lorquini):
Limenitis_lorquini-090819-5389The Lorquin’s Admiral is thought to be a Batesian mimic of the California Sister, which is reportedly much less palatable to predators.

Woodland Skipper (Ochlodes sylvanoides) nectaring on *Douglas’s Threadleaf Ragwort (Senecio flaccidus var. douglasii):Ochlodes_sylvanoides-090819-5517The Woodland Skippers were all over Evey Canyon on Sunday.  Douglas’s Threadleaf Ragwort blooms later than most and attracts a lot of bees and butterflies in late summer and early fall.

A robber fly (*Stenopogon sp.) with a *Western Yellowjacket (Vespula pensylvanica) prey:Robber_fly-090819-5435This was a two-fer!  Both the Stenopogon robber fly and the Western Yellowjacket were new additions to our project. Isn’t the robber fly a fearsome-looking creature?

A long-horned beetle (*Tragidion annulatum):Tragidion_annulatum-090819-5486With its blue iridescent body and coppery elytra, this large, colorful beetle is an amazing tarantula hawk mimic.

*Genista Broom Moth (Uresiphita reversalis) caterpillar on Spanish Broom (Spartium junceum):Uresiphita_reversalis-090819-5573There were quite a few of these on the broom in Evey Canyon – four on this plant alone. Who knew there was a moth that used broom as a host plant?  We say, “Go caterpillars!  Eat broom!”

If you made observations in the Park but didn’t report them, don’t worry!  You can submit them any time, and they will still be counted both for the Park and for the statewide California Biodiversity Day project.

Celebrate Biodiversity Day at the Wilderness Park!

September 7, 2019 marks the first official celebration of California Biodiversity Day, an annual event created last year to celebrate the state’s exceptional biodiversity and encourage actions to protect it.  The city of Claremont Park Rangers together with the Friends of the Wilderness Park will be observing California Biodiversity Day 2019 at the Claremont Hills Wilderness Park.

Join us this Saturday, September 7th from 6:30am to 9:30am and learn how to use your phone to contribute to science and the Wilderness Park with iNaturalist!  Just look for the canopy near the North Mills entrance for more information!

Already an iNaturalist user?

Please come and help show others to use the iNaturalist app!

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:

  1. Go to and create a free account. You should see “SIGN UP” featured prominently on the homepage.   Otherwise, there’s a “Sign Up” link in the top right corner.
  2. On your smart phone, go to the Apple Store or the Google Play store and download the iNaturalist app.

Once you’ve signed up, you can enter observations from either your phone or computer.  The iNaturalist site has a really good explanation here:

The page also has links to video tutorials.

The Wilderness Park Biota Project:


The Friends of the Wilderness Park have created an iNaturalist project for documenting the plants and animals of the Wilderness Park.  If you make iNaturalist observations in the Park, they will automatically be collected and added to the project!

If you’d like to check out the CHWP project and see what’s already been reported, just go here:

A few tips for best practices:

  • If feasible, crop your photos to feature the subject, especially if it’s not clear whether the subject is the bird or the tree, for example.
  • Include a little description. For one thing, you can use the description to say what’s the subject.  But you can also note any additional details, interesting behavior, type of habitat, odors, etc. that may not be obvious from the photo.
  • Give the most specific ID you can, even if it’s not to the species level. For instance, “insect”, “snake”, or even “plant” or “animal” is better than just having “unknown”.
  • Give a little info about yourself in your profile — it increases your credibility.