• Getting a close-up look at an insect during a bioblitz
    Getting a close-up look at an insect during a bioblitz
  • Bioblitzing in the rain at Sam McDonald County Park
    Bioblitzing in the rain at Sam McDonald County Park!
  • Bioblitzing Lake Merritt in Oakland
    Exploring Lake Merritt in Oakland
  • Getting ready to bioblitz Golden Gate Park
    Getting ready to bioblitz Golden Gate Park
  • Looking for birds at a bioblitz in San Francisco
    Looking for birds at a bioblitz in San Francisco
  • Documenting plants on Ring Mountain with San Francisco Bay in the background
    Documenting plants on Ring Mountain with San Francisco Bay in the background
  • Documenting a newt during a bioblitz
    Documenting a newt during a bioblitz
  • Gathering at the start of a bioblitz
    Gathering at the start of a bioblitz
  • Documenting species using iNaturalist at a Yerba Buena Island bioblitz
    Documenting species using iNaturalist at a Yerba Buena Island bioblitz
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Bioblitzes are gatherings of scientists, citizen scientists, land managers, and more, all working together to find and identify as many different species as possible. Bioblitzes not only help land managers build a species list and atlas for their park and provide invaluable data for researchers, they also highlight the incredible biodiversity in these Bay Area oases.

Our bioblitzes are open to anyone and are family-friendly. Just bring your smartphone with the iNaturalist app, your curiosity, and your powers of observation to help catalog the natural wonders of our parks and open spaces.

We've been hosting grassroots bioblitzes in our community for over 5 years. Explore the events we've helped host in the past here!

Check below to find out about upcoming grassroots bioblitzes. Links will be live once the bioblitz is open for registration. Registration is free, but be sure to let us know you're coming so we can send you all the information you need prior to the bioblitz!

 

 

Friday, April 26th - Monday, April 29th: City Nature Challenge

CNC 2019 logo

More than 150 cities on 6 continents will be competing April 26-29 to see how many wildlife observations their residents and visitors can make! Join the fun in the San Francisco Bay Area by making as many observations of as many species as possible! 

Come to an event for the City Nature Challenge in the San Francisco Bay Area! Participating in an event will give you the chance to meet other people in the Bay Area who are interested in nature. Join a bioblitz to learn how to use iNaturalist and document the species all around us in the Bay Area. Come to an identification party to help ID the observations made throughout the Bay Area during the City Nature Challenge - all experience levels welcome!

Click the link for an event to learn more (times, where to meet, what to bring) and to register.

Thursday, April 18

Friday, April 26

Saturday, April 27

Sunday, April 28

Monday, April 29

Wednesday, May 1

 

 

 

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Saturday, April 27th: Huddart Park Bioblitz

huddart park

Come out with Cal Academy and our partners to discover what species live in Huddart Park. We explored one half of the park with San Mateo County Parks and a great group of citizen scientists this past fall, and we want to see what lives in the other half! This bioblitz is during the City Nature Challenge and is a great opportunity to make some iNaturalist observations for the Bay Area!

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Partner Organizations

We are lucky enough to partner with organizations who also host their own citizen science events. Check out their pages for some great upcoming bioblitzes, restoration days and more!

One Tam

California Center for Natural History

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Join iNaturalist

Join iNaturalist

Our bioblitzes are powered by iNaturalist, our in-house, citizen science platform. It's a community-powered website and app that makes it easy to upload and share your observations in the field and to get help from other users with flora and fauna IDs.