Serving Larchmont Village, Hancock Park, and the Greater Wilshire neighborhoods of Los Angeles since 2011.

City Nature Challenge Tallies More than 1.27 Million Wildlife Observations

Citizen Scientist and Buzz reader Linda Sanoff shared this photo of a Mule deer (Odocoileus hemionus) she observed at Lake Hollywood during the City Nature Challenge.


The 2021 City Nature Challenge (CNC) results are in! According to the Natural History Museum of Los Angeles County, more than 52,000 people across six continents documented more than 1.27 million wildlife observations for the 6th annual community science initiative. Organizers reported sightings from citizen scientists all over the world during the event period from April 30 to May 3, with reports including a critically imperiled flower from the U.S., documentation of an uptick in urban wildlife activity due to shelter-in-place orders, and other observations that help scientists create a valuable snapshot in time of urban biodiversity.


Screenshot from the website. Click the image to connect to the site.


After co-founding and organizing the first-ever City Nature Challenge in 2016 as a competition between the Los Angeles and San Francisco metro areas, the Natural History Museum of Los Angeles County (NHM) and the California Academy of Sciences has expanded the initiative to 419 cities across 44 countries. This year’s Challenge tallied more than 1.27 million observations, including more than 2,100 rare, endangered, or threatened species.  It also engaged more than 52,000 observers (more than ever before), and recorded more than 45,000 species worldwide. In light of COVID-19, this year’s Challenge was not a competition. Instead, participants were encouraged to embrace the collaborative aspect of sharing observations online with a digital community and celebrate the healing power of nature safely from home.

Here’s the scoop on LA County numbers:

  • 1,507 observers
  • 2,639 species documented
  • 22,045 observations submitted to iNaturalist
  • Most observed species: western fence lizard (Sceloporus occidentalis)

You can view all L.A County iNaturalist results here.

Los Angeles County highlights

  • Gabb’s Checkerspot Butterfly – This vulnerable butterfly species was recorded twice this year and found in two different areas of eastern L.A. county.
  • San Clemente Snail – Only one observation of this critically imperiled snail was made during the City Nature Challenge this year. It exists on San Clemente Island and nowhere else in the world.
  • Green Sea Turtle – Two sea turtles were observed near the mouth of the San Gabriel River. This threatened species has made a home near the warm water outflows of a local power plant, and represents the northern-most population of this sea turtle species.
  • Gopher Snake – Although a well-known resident of the L.A. area, gopher snakes are rarely seen. Thanks to the thousands of community scientists taking part in L.A., together we clocked 16 observations. The individual shown at this link was sunning itself on a hilltop in Mount Washington, with an amazing view of the city below.

“It has been amazing to see so many new cities and communities of  people from around the globe come together to celebrate nature during this year’s event, especially in light of the continued pandemic,” said Lila Higgins, co-founder of the City Nature Challenge and Natural History Museums of Los Angeles County (NHMLAC) Senior Community Science Manager. “I’m still in a state of awe that over 52,000 people were compelled to connect with nature in this way, and even though so many of us still have to be apart, people came together virtually to make over 1.27 million records of living beings on our planet!”

World by the numbers

  • More than 52,000 observers
  • More than 1.27 million observations submitted to iNaturalist
  • Over 45,000 species documented, including over 2,100 rare, endangered, or threatened species
  • Most observed species: Mallad duck (Anas platyrhynchos)

View all global iNaturalist results here.

World highlights

Highlights from around the U.S. and the world include an Almirante Blanca butterfly, the first documented sighting of this rare butterfly species in Argentina and the southernmost record in all of South America; a critically imperiled Simpson’s grasspink flower in Florida; a first record of an introduced Turkish snail, found in the Czech Republic at a railway shipment yard; a rarely seen orchid bee in Columbia, the first time it has been recorded in the country on iNaturalist and also the first ever record of it on the platform; and a near threatened witches’ cauldron fungus found in Russia.

The current landscape of urban biodiversity is poorly understood. As global human populations grow increasingly concentrated in cities, documenting urban biodiversity—and our impact on it—is a crucial part of understanding our shared future. Large pools of data, including those built by iNaturalist and natural history museums, aid in scientific research and help land managers make informed conservation decisions for humans to sustainably coexist with regional plant and animal life.

In 2020, the Challenge tallied over 815,000 observations, including over 1,300 rare, endangered, or threatened species; engaged over 41,000 observers; and recorded over 45,300 species worldwide.

Urban nature initiatives at the Natural History Museum of Los Angeles County (NHM)

In the last several years, NHM has shifted its attention to include not just natural and cultural history, but living nature—and specifically, the nature of L.A. With the 2013 addition of the outdoor Nature Gardens and it companion indoor exhibit, the Nature Lab, the museum has onsite venues that engage Angelenos in an investigation of the nature around them. Additionally, the museum’s Urban Nature Research Center (UNRC) and Community Science Program help spotlight ways to boost and sustain Los Angeles’ biodiversity. UNRC and Community Science Program initiatives include the City Nature Challenge, co-founded with the California Academy of Science; SuperProject, the world’s largest urban biodiversity survey; RASCals (Reptiles and Amphibians of Southern California); SLIME (Snails and Slugs Livings in Metropolitan Environments); BioSCAN(Biodiversity Science: City and Nature); Southern California Squirrel Survey; L.A. Spider Survey; and more. Visit NHMLAC.ORG/nature for more information.

More Information and Education Toolkit



Green-backed Lesser Goldfinch spotted in a neighborhood Chinese Elm Tree. (photo from Dan Alanis)


Black-eyed Junco spotted in a local Camphor tree. (photo from Dan Alanis)


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Patricia Lombard
Patricia Lombard
Patricia Lombard is the publisher of the Larchmont Buzz. Patty lives with her family in Fremont Place. She has been active in neighborhood issues since moving here in 1989. Her pictorial history, "Larchmont" for Arcadia Press is available at Chevalier's Books.

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