Webinar Recordings

listed by topic ( or see most recent)

All About Lichen

All About Lichen

Mount Diablo is a bio-diversity hotspot for all kinds of animal and plant life, but what about lichens? Cat Chang will share her interest in the tiny world of these fascinating partnerships of fungi and photobionts. We’ll take a look at what is found in the State Park and the surrounding areas. Bring your lichen questions!

American Kestrel

American Kestrel

Learn about North America’s smallest falcon, the American Kestrel. This colorful and intelligent raptor can be seen hunting in the open spaces around Mount Diablo. Researchers struggle to explain the steady decline of kestrel populations over the years, thus rallying the help of citizen scientists to raise nest boxes and contribute breeding data for national studies. Brian Richardson will share a deep dive review of this treasured bird of prey, along with nesting activity of local nest boxes.

Annual Meeting of the Members - 2020

Annual Meeting of the Members - 2020

This is a brief 30-minute meeting of the membership! We will update you on the current status of the park, what's open and what isn't. You'll get to hear about some of the great things MDIA has been able to do during the pandemic and what our plans are for the coming year including the 100th birthday of Mount Diablo State Park. We'll vote in some new board members and say goodbye to retiring ones. As a special thank-you for attending, we will tell you how you can get 30% off anything in our online store!

Birds of Mount Diablo

Birds of Mount Diablo

Birding and bird photography enthusiast Jerry Britten will present a slideshow of Birds of Mount Diablo. Far from an exhaustive overview, he will focus instead on a subset of birds including hummingbirds, spring warblers, some uncommon birds and some ID challenges. His presentation will feature sound recordings as well as photographs. Jerry is the President of Mount Diablo Audubon Society, and a volunteer property monitoring steward and hike leader for Save Mount Diablo. He has seen over 1500 species of birds, and photographed over 1100, on travels in the Americas, Africa, Europe and Asia.

Butterflies of Mount Diablo

Butterflies of Mount Diablo

Join MDIA naturalist Michael Marchiano to view a cross-section of butterflies found on Mount Diablo winter through fall. View the photographs of outstanding nature photographer and naturalist Dan Fitzgerald and be surprised by the number of species that can be seen on the mountain, for those that take the time to stop and look. Learn interesting facts about butterflies from the "giant" Tiger Swallowtail to the "tiny" Pygmy Blue. Find out about our MDIA Butterfly Guide and (in the future when COVID restrictions permit) join MDIA leaders on a butterfly hike.

California Naturalist Graduate Projects

California Naturalist Graduate Projects

This is a symposium showcasing Cal Nat graduates as they share their capstone projects. Dan Sandri, Harry York, Linda Kwong, and Tere Dixon completed some amazing projects for their class. Their projects cover a wide range of naturalist topics including the new wildflower guide, biking highlights up the mountain, a native bee guide, and a template for outdoor science education. Watch and enjoy the creativity and passion each person brought to their project. For more information about the California Naturalist Course for the Mount Diablo Region go to: https://calnat.ucanr.edu/Take_a_class/Las_Positas_College/

California’s Iconic Oaks and Their Many Relations

California’s Iconic Oaks and Their Many Relations

Oaks support more life forms than any other tree in North America, and California’s oaks are no exception. In a presentation filled with woodpeckers, woodrats, wood ducks, and many other organisms, author and naturalist Kate Marianchild will explain why oaks play such an important role in oak woodland food webs. She will talk about animals that rely on oaks for food, shelter, foraging substrate, and more, and oak mistletoe as a keystone genus. We’ll hear about the eleven functions of a gray squirrel’s tail, and we’ll marvel at the tiny wasps who bend oaks to their bidding. We will crawl with Kate through woodrat mansions, fight for breeding opportunities with acorn woodpeckers, and navigate through an oak with the third eye of the western fence lizard. Who could stay away?

Cattle's Role in Conservation

Cattle's Role in Conservation

Cattle's Role in Conservation:

You will hear from Cari Koopman, Tim's daughter, about the role grazing plays in conservation. She will share the commitment ranchers have to being stewards of the land. This two part series will give you a good understanding of current ranching practices and help you to interpret the role cattle play within Mount Diablo State Park, on both private land and State Park land.

Common Spiders of Mount Diablo

Common Spiders of Mount Diablo

Step inside the world of spiders with Dr. Jack Fraser through his pictures and stories in this webinar from Mount Diablo Interpretive Association. You'll be amazed by the widely varied locations, eating habits, and defense mechanisms of these fascinating creatures, giving you a new appreciation for spiders and how to find them—not always where you expected!

Coyote Behavior in the Urban Interface

Coyote Behavior in the Urban Interface

With local human/coyote interactions fresh in the news of late, this is a timely discussion. We will address urban coyote behavior and management and the delicate interface between humans and the most persecuted keystone species in North America. How education and understanding is the only way forward.

Dinosaurs of Diablo (sort of)

Dinosaurs of Diablo (sort of)

Ancient mastodons, horses, camels, saber tooth tigers, bone crushing dogs on Mount Diablo….who knew? Lisa White, the Director of Education and Outreach at the UC Museum of Paleontology will share the amazing discoveries that have been uncovered in the Blackhawk Ranch Quarry on Mount Diablo. You will learn about the paleontological digs on this site and the amazing array of plants and animals that have been found on this unique locality since research began in the 1950’s.

Discover Mary Bowerman Trail

Discover Mary Bowerman Trail

Join MDIA board member and California Naturalist graduate Dan Fitzgerald as he takes you on a virtual tour around the Mary Bowerman Trail at the summit of Mount Diablo. There are over 125 wildflowers that bloom on the Mary Bowerman Trail! Dan will show you some of the ones he has photographed along the trail and the butterflies he has found using them.

Forgotten Landscapes of California

Forgotten Landscapes of California

Laura Cunningham, an accomplished artist and author, presents this webinar. Cunningham’s life's work is at once a celebration of California’s past – its natural legacy of abundance and diversity – and of change. In A State of Change: Forgotten Landscapes of California Cunningham imagines what a prehistoric California must have looked like using research from history, prehistory, field work, and scientific illustration.

Geology of Mount Diablo

Geology of Mount Diablo

John Karachewski, a geologist, hiker, bike rider and photographer will take you on a ride up Northgate and Summit Roads to see over 200 million years of geological history. Your front-seat journey takes you from ancient lava flows erupted on the seafloor thousands of miles away to modern landslides as you learn how Mount Diablo became the prominent natural landmark of Northern California.

Geology of Mount Diablo: 2 New Publications

Geology of Mount Diablo: 2 New Publications

Highlights from Two New Publications on the Geology of Mount Diablo is presented by Greg Bartow. Greg discusses some brand new resources to help you understand the geology of the mountain. The first is an expansive book titled Regional Geology of Mount Diablo, California: Its Tectonic Evolution on the North America Plate Boundary. A second publication is Geologic Guide to Mount Diablo, a simplified guide in the form of a geologic trail map on one side and interpretive information suitable for the layperson on the back.

Greg is Water Infrastructure Advisor, California State Parks and the editor of our new full color geologic map.

Gray Foxes and Extinctions, Local & Global

Gray Foxes and Extinctions, Local & Global

In studying gray foxes for more almost two decades on the Bay near Palo Alto, Bill Leikam, known as "the fox guy," has good reason for his gentle but implacable statements about relentless urban development and the fast-paced loss of species across the globe. Foxes need wild lands, and so do humans. We know that, but not all humans see it that way. When Bill talks about fragmentation of habitat, we need only to think of all the hacked trails on and around the mountain to see exactly what he means. Where can the wildlife go to get away from us?

Hiking Apps Introduction

Hiking Apps Introduction

Hiking applications for cell phones promise to navigate while hiking, suggest trails to get to a specific location, post reviews by prior hikers, and/or record a hiker’s actual route. These programs, when properly used, can be helpful navigation aids, but they also have limitations. The webinar  includes live displays of the features of each of these applications and present hints when using hiking apps in the Mount Diablo State Park.

Insects of Mount Diablo: Spring and Summer

Insects of Mount Diablo: Spring and Summer

This webinar covers some of the amazing lifecycles of the insects you can look out for on and around Mount Diablo. As we enter the beautiful season of Spring we look forward to seeing a burst of wildflowers and plant life, as well as witnessing the return of migrating birds and re-emerging reptiles. Much of the Spring activity we see on the mountain is based on the boom in numbers of insects. What are the colorful, fascinating insects we might encounter as we walk the trails of Mount Diablo in Spring and early Summer, and how do they interact with each other?

Mitchell Canyon Birding Hotspot – Spring Migration

Mitchell Canyon Birding Hotspot – Spring Migration

Spring in the East Bay outdoors means enjoying comfortable weather, looking at beautiful wildflowers, and greeting the colorful migratory birds flying up from further south that either settle here to find mates and nest, or stop briefly before continuing up north. Mitchell Canyon, on the north slope of Mount Diablo and lying within Mount Diablo State Park, is known by birders as perhaps the best place around to see this annual rush of feathered color and song.


In this presentation you will see some beautiful birds, fascinating migratory maps and learn what we all must do to help Mitchell Canyon’s beautiful birds survive. Presented by Juan Pablo Galván Martínez (Mount Diablo State Park volunteer, Mount Diablo Audubon Society Conservation Chair, and Senior Land Use Manager for Save Mount Diablo).

Mount Diablo State Park 100th Anniversary

Mount Diablo State Park 100th Anniversary

This year marks the 100th anniversary of Mount Diablo State Park. To celebrate, we've created a film about the mountain's natural heritage and human history, featuring naturalists Ken Lavin and Michael Marchiano, Save Mount Diablo land conservation director Seth Adams, former East Bay Regional Park general manager Robert Doyle,  East Bay Ohlone and co-founder of Cafe Ohlone Vincent Medina, and Mount Diablo State Park supervising ranger Cameron Morrison.


Join an inspiring journey through the lands that sustain us close to home.   Presented by Mount Diablo Interpretive Association in partnership with Save Mount Diablo and Mount Diablo State Park. 


Photography and video by Kendall Oei, Scott Hein, Wally de Young, Dan Fitzgerald, and Floyd McCluhan. Music by Phil Heywood. Writing, narration, and production by Joan Hamilton.

Native Bees of Mount Diablo

Native Bees of Mount Diablo

It is Springtime and native bees can be seen all over Mount Diablo: on the wildflowers, blooming shrubs and trees, and patrolling the trails of the mountain. Join entomology enthusiast and MDIA Board member Dan Sandri for a presentation about the native bees of Mount Diablo, and learn what these bees are doing. See tips on how to identify some of the most-common native bees found on the mountain, and hear about their life cycles and habits. How long do they live? What are the threats they face from predators, parasites and the changing environment, and what can you do to help them?

Native Trees of Mount Diablo

Native Trees of Mount Diablo

Wildflowers are the divas of springtime, but the allure of our native trees extends through every season. Join us for a virtual stroll up Mitchell Canyon and indulge your inner druid as we share fascinating tidbits about Diablo’s dendritic darlings. How is climate change and habitat loss impacting our native trees? What tree was the original source of aspirin? Which is the “gasoline tree”? And which tree offers a goodly but inedible crop of “California pears”?  We'll also share tales of early day botanical explorers who risked life and limb to learn the secrets of the trees.

Native to Right Here: the plants, animals, and people of Tuushtak

Native to Right Here: the plants, animals, and people of Tuushtak

In this 25-minute film premiere, Cafe Ohlone founders Vincent Medina and Louis Trevino lead a walk in the hills below their most sacred peak, Tuushtak, aka Mount Diablo. As they point out plants and animals along the way, they discuss Ohlone history, culture, and cuisine—and how we can all celebrate what is "native to right here." Vincent and Louis have graciously agreed to answer your questions following the premier.


Sponsored by Mount Diablo Interpretive Association. Videography by Wally De Young. Music by Phil Heywood. Photos by Scott Hein, Arnold Joe, Cindy Roessler, Wally De Young. Production by Joan Hamilton.

Newt and other Amphibians of Contra Costa County

Newt and other Amphibians of Contra Costa County

With Winter rains come the filling of ponds and streams and the emergence of our local frogs, salamanders, and toads returning to their seasonal mating grounds. Find out which Amphibians live in our county and their role in the environment. Learn about the endangered species that live on Mount Diablo and how they survive our long hot summers. Maybe one or two live specimens will appear on your screen.

Night Sky Above Mount Diablo on the Winter Solstice

Night Sky Above Mount Diablo on the Winter Solstice

Please join MDIA in looking upward to the skies. We will have an amazing presentation by Steve Jacobs, president of the Mount Diablo Astronomical Society (MDAS) and colleagues talking about the programs they conduct at the summit, and about how the winter solstice (December 21) will have an effect on humans, animals, and plants as we change the seasons. Join us for this fascinating program to learn about the sky above Mount Diablo and see some of the beautiful images of the night sky their members have produced.

Opossums: Misunderstood

Opossums: Misunderstood

Opossums are a small non-native mammal. It is North America's only marsupial and has an interesting physiology, such as a pouch to hold developing young, and a gestation period of 13 days. Opossums can be seen in both urban and rural environments, and have adapted new behaviors to live in an urban environment. Didelphis virginiana is considered a 'generalist' and has a loose set of cultural requirements that adapt to different habitats. These animals are generally misunderstood and viewed as aggressive. One reason for this view is because they hiss when threatened. Aggression is not an accurate depiction of it's behavior. Opossums are a part of our world, as we are a part of theirs. There is much to learn!

Peregrine Falcons of Pine Canyon

Peregrine Falcons of Pine Canyon

Join Peregrine Team leader Staci Hobbet and Wally De Young for an up close and personal look at the Peregrine Falcons of Pine Canyon. You'll learn about this incredible apex predator and the remarkable success story of their reintroduction after local extinction; the mission of the volunteers known as the Peregrine Team; as well as a look at the struggles the Peregrine encountered this very season.

Ranching History

Ranching History

Ranching History:

This ranch has been run by the Koopman family since 1918 and has continually evolved practices to become a model of conservation ranching. You will hear stories of this ranching history from where it started, to what it has become today.

Rat Poison Kills More Than Rats

Rat Poison Kills More Than Rats

Is rat poison our “new DDT”? Raptors are the Solution (RATS) will discuss the impacts on wildlife being caused by anticoagulant rodenticides in the food web. RATS will explain the effects of these poisons on birds of prey as well as on bobcats, mountain lions, foxes, and Pacific fishers, among many other animals, including domestic pets. We will discuss AB 1788, which went into effect on Jan. 1, 2021, and RATS’ legal efforts to better regulate these poisons, as well as alternatives to rodenticides, and what individuals and municipalities can do to help beneficial predators thrive and continue to provide us with their free, natural, pest control services.

Reptilian Mount Diablo

Reptilian Mount Diablo

What reptiles inhabit our open spaces? Snakes, Lizards and even a Turtle are found on Mount Diablo. Learn to recognize these fascinating creatures on the sky-island in the middle of Contra Costa County. Join us and find out about the unusual and rare reptiles that inhabit this natural wonderland. What are the true facts about the only venomous snake found in Northern California, the Northern Pacific Rattlesnake? Find out about, "Blue Bellies, Horned Toads, and Whiptails." Join Contra Costa Native, naturalist Michael Marchiano, who has studied and photographed these amazing animals since childhood as he shares his enthusiasm for these often maligned creatures.

Rooted In Relationship: Art and Illustration

Rooted In Relationship: Art and Illustration

Artist, writer, and illustrator Christopher Reiger presents a survey of his artwork and illustration. Christopher is fascinated with natural history, conservation, and ecology, and his visual art and writing projects wrestle particularly with the human relationship to nonhuman animal species. Christopher lives in Santa Rosa with his wife and two young sons.

Spiders in Your Neighborhood

Spiders in Your Neighborhood

Spiders! Scary? Maybe. Cool? Definitely. Author Pat Stadille used to be terribly afraid of these eight-legged daddies, until he started learning more about them. Now spiders are his best friends. Once you hear about their silky skills, hunting habits, and generally shy and gentle nature, you might feel the same way. Learn about jumpers, wolf spiders, tarantulas, the “bird turd spider,” and, of course, the black widow. This much-expanded edition is bursting with new species and new spider science. Spiders in Your Neighborhood  features detailed drawings and photos of the critters you’ll find, and sections on types of webs, how and where to discover spiders, spider anatomy, and common relatives. This edition also features guided science experiments for budding naturalists; and nature journalists will love Pat’s observation tips and drawing lessons. Grab a flashlight, your sleuthing kit, and join Pat “Spiderman” Stadille on a journey around your backyard that will leave you spinning with excitement.

Tarantula Time on the Mountain

Tarantula Time on the Mountain

Michael Marchiano shares his deep knowledge of the tarantulas, why we mostly see them during these few months, which ones we see and what life is like for these gentle giants of the spider world.   Don't miss this opportunity to learn more about these fascinating spiders.

Tick Talk

Tick Talk

One Bite Can Change Your Life

Lyme disease is prevalent in Northern California, yet most practicing physicians don’t recognize the signs and symptoms of the disease.  You have to be your own best warrior.  Learn how to prevent tick bites, recognize the ticks that are prevalent in Contra Costa County and the disease they carry, and what to do if you are bitten.  Carolyn Degnan, COO of LymeDisease.org will talk about the  steps you need to know to protect yourself, your family and your pets from this debilitating disease.  Carolyn is a longtime resident of CCC and has two daughters who were bitten in the San Ramon Valley. Both daughters contracted Lyme disease and multiple co-infections while hiking and trail riding.  She has been a Lyme advocate since 2002 giving Lyme prevention talks to The US Forest Service, EBMUD, PG&E, Boy and Girls Scout troops, Fire Fighters, local service clubs, etc.  Any question you would like to have answered during the hour can be directed to Carolyn at cdegnan@lymedisease.org.

Understanding Tarantulas      (The gentle giants of Mount Diablo)

Understanding Tarantulas (The gentle giants of Mount Diablo)

Join us in this webinar presented by Chris Hamilton, Assistant Professor of Entomology, Plant Pathology and Nematology at the University of Idaho.  He has studied tarantulas, including those on Mount Diablo.


He will talk about Aphonopelma in general, the current state of our knowledge, and what his lab is working on right now including the Aphonopelma iodius species complex – which includes the Mount Diablo spider.

Watersheds in Mount Diablo

Watersheds in Mount Diablo

Mount Diablo’s and Surrounding Watersheds in Today’s World: What’s happening with the health of Contra Costa Watersheds in today’s world of political and environmental issues? Can we find any bits of encouragement amidst climate change, wildfires and political strife? Let’s take a look at the news and see if we can glean something positive from the realities of your local watershed today.

Watersheds of Mount Diablo

Watersheds of Mount Diablo

Mount Diablo is an integral part of three major watersheds in Contra Costa County.  This presentation will explore what a watershed is, how watersheds work and their environmental challenges.  We will look at watershed management considerations at Mount Diablo State Park.  Presenter for this webinar is Steve Elliott, one of the long time volunteer leads at the Park.

Wild Boar Ecology

Wild Boar Ecology

Doc Hale discusses the ecology of the Wild Boar (Sus scrofa) and feral pigs in Contra Costa County. He  highlights their introduction into the state, their dispersal, ecological impacts, and management. Doc has been fascinated with Wild Boar since childhood, and has researched their presence throughout history, California, and the world.

Wild Cats of Mount Diablo

Wild Cats of Mount Diablo

Learn about the Felidae Conservation Funds' current work with mountain lions and bobcats around Mount Diablo and throughout the Bay Area, including mountain lion ecology, history, and the challenges of sharing habitat with wild felids in California. Learn essential tips for living and recreating without fear. Our presenter will also discuss the important role of wild cats in creating healthy ecosystems and enjoy engaging photos and videos.

Wildflowers of Mount Diablo

Wildflowers of Mount Diablo

Mount Diablo Interpretive Association President and Mount Diablo State Park Docent Steve Smith discusses how some of our flowers earned their wild names, how flowers have been used by humans ritualistically throughout the ages, and why we chose some of these flowers to represent our state and country.

Wildlife on the Trails

Wildlife on the Trails

Share the Trails with Sue Griffin, a roving naturalist and an accomplished photographer who hikes the Diablo range daily. She will share some of her favorite wildlife photos taken in the Diablo range. You will learn some fun facts as she shares interesting stories of animal behavior. Sue will also share some photography tips she has learned along the way. Join us for this fun and interesting webinar.

iNaturalist Basics

iNaturalist Basics

In this first of a two part webinar, you will learn why iNat is such an amazing resource for scientists, researchers and nature-lovers, alike. We cover how iNat works and how to post observations. It is recommended that you create an iNaturalist account prior to the session, so you can work with it hands-on, right away. Just go to: http://www.inaturalist.org/ to sign up, and download the app in your phone's app store.

iNaturalist: The Next Step

iNaturalist: The Next Step

In this second of a two-part webinar, iNaturalist: The Next Step, you will learn how to harness the power of inaturalist.com for your own research and learning, and to share with your nature/outdoor friends. It is recommended that you create an iNaturalist account prior to the session, so you can work with it hands-on, right away. Just go to: http://www.inaturalist.org/ to sign up, and download the app in your phone's app store.