BioBlitz in the Claremont Hills Wilderness Park – Saturday, April 30!

Posted on by friendsofthewildernesspark

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

The Friends booth for the California Biodiversity Day BioBlitz in 2019.

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:

  1. Go to iNaturalist.org 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.
Vicki Salazar makes an observation with her smartphone.

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:

  • Virtual iNaturalist Training
    Tuesday, April 26, 7:00–8:00 pm
    Zoom (register to get the link)
    Free!
    Free online iNaturalist training with experts from the Natural History Museum of Los Angeles County, Aquarium of the Pacific, and the National Wildlife Federation. Learn how to participate in the City Nature Challenge and other community science projects by turning your photos of plants, animals, and other wildlife into data points for science!
    Register in advance for Zoom link at https://bit.ly/INat-april26. (Event will also live stream on Youtube with captions)
  • Introduction to iNaturalist
    Saturday, April 30, 10:00am–12:00 pm
    California Botanic Garden
    Adult $16 | CalBG member $11 | Student $9
    The class will be led by botanist and photographer Keir Morse, who will break down the features of iNaturalist and teach you the best ways to log your finds and photograph plants so that they can be accurately identified. Keir will also introduce you to some of the more advanced features of the website. You can attend the class, then head over to the Wilderness Park while all of Keir’s tips are fresh in your mind.

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.

Earth Day with the Friends

Posted on by friendsofthewildernesspark

Since 1970, April 22 has been celebrated annually as “Earth Day” – a day to demonstrate support for environmental protection. This year’s theme for Earth Day is “Invest in Our Planet”, and the City of Claremont’s establishment of the Claremont Hills Wilderness Park is a fine example of investing in our planet by protecting the habitat, wildlife, and watershed of our hillsides.

The Friends of the Wilderness Park are celebrating Earth Day in two ways:

Celebration at Shelton Park on Sunday April 24

Sustainable Claremont is hosting an Earth Day Celebration in Shelton Park (the first in-person Earth Day celebration since 2019), and the Friends will be there! Stop by our booth and learn more about the Wilderness Park, what the Friends do, and how you can be involved in caring for the Park. We look forward to seeing you!

Date: Sunday April 24, 2022
Time: 8:30 AM – 12:30 PM
Where:  Shelton Park, Claremont (corner of Bonita Avenue & Harvard Avenue)

Trash Pick-up Kits

Last Saturday, at our Second Saturday event, the Friends gave out Trash Clean-up Kits containing gloves and trash bag with instructions to visit the Wilderness Park or another park and pick up trash and an encouragement to pick up trash every month.

Earth Day Trash Pick-up Kits waiting to be picked up.

All the kits were gone in 45 minutes. Some Park visitors picked them up for their children, and one pre-school teacher took some for her class. Why don’t we all take a few minutes to pick up some trash?

Question of the Day: Why did the tarantula cross the road?

Posted on by friendsofthewildernesspark

If you’ve been to the Wilderness Park recently, you may have spotted tarantulas out on the fire trails, and you might well wonder:

Why are so many tarantulas out now?
Why are they crossing the roads?

The tarantulas you see out on the roads this time of year are all adult males, and they are out looking for females. They really have only one thing on their little tarantula minds, and they are pretty oblivious to anything else.

A male California Ebony Tarantula (Aphonopelma eutylenum) crossing Johnson’s Pasture Rd in the Wilderness Park. On the front legs you can see the tibial hooks or spurs that are used to grasp the female during mating. ©Nancy Hamlett.


The females are found in burrows that are scattered across the landscape, and the males search for them by alternating between walking in straight lines and walking in concentric circles until a female’s scent is detected, suggesting that a burrow is nearby. The males may travel as much as 3/4 of a mile looking for a mate, and if a road is in their path, they just trundle on across it.

Once a male has found a female’s burrow, he signals his presence by doing some fancy drumming on the ground at the burrow’s entrance. If the female likes his drumming, she will emerge from her burrow, and mating can commence. The male uses special hooks on its front legs (which you can see in photo above) to immobilize the female’s fangs and position her during mating.

Autumn is the mating season for tarantulas, so that’s when you’ll most likely spot the males out on their mating missions. If we look at the distribution of tarantula sightings reported on our iNaturalist project, you can see that over 80% of the observations were made in August – November.

Tarantula observations in the Wilderness Park by month. Nineteen of 23 iNaturalist observations (83%) were made in August – November.

It’s not clear exactly how many tarantula species reside in the Wilderness Park. Only one species – California Ebony Tarantula (Aphonopelma eutylenum) – has iNaturalist observations labeled as “Research Grade”, meaning that the identification has been confirmed by a consensus of other identifiers. Steindacher’s Ebony Tarantula (Aphonopelma steindachneri) has also been reported, but the identifications have not been confirmed.

Different Aphonopelma species look very similar and can be extremely difficult to distinguish without molecular data (see Hamilton et al., 2016), so we may never know whether one or two species are present in the Park. You can see all the reported iNaturalist observations of tarantulas in the Park here.

If you’d like to find out more about the tarantula’s life cycle, check out Ralph Washington, Jr.’s article in Bay Nature magazine.

California Biodiversity “Day” in the Wilderness Park

Posted on by friendsofthewildernesspark

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 growing up Johnson’s Pasture Road on the “loop”. © Peri Lee · some rights reserved
Telegraph Weed – flower detail. © Peri Lee · some rights reserved

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)

Threadleaf Groundsel next to Palmer-Evey Mountainway. © travisbbotany · some rights reserved

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.)

A Small Carpenter Bee on California Aster (Corethrogyne filaginifolia) next to the Cobal Canyon Trail.
© Nancy Hamlett · some rights reserved

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)

A Woodland Skipper nectaring on Cliff Aster (Malacothrix saxatilis) next to the Cobal Canyon Trail.
© Nancy Hamlett · some rights reserved

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.

Celebrate California Biodiversity Day in the Park September 11

Posted on by friendsofthewildernesspark

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:

  1. Go to iNaturalist.org 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:

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:

iNat_project_header

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:

  • 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.