Texas Results

The City Nature Challenge is a global, city-scale BioBlitz event that frames an urban biodiversity survey as a friendly competition between cities. Data collection was April 30 to May 3, 2021 and identifications May 4 to 9, 2021.

Texas Numbers

  • 14 Texas projects
  • 78 Texas counties
  • over 131,000 observations
  • over 7,000 species recorded
  • over 4,800 observers
  • over 2,000 identifiers

Restorative Power of Nature United Us
in Challenging Times

Owing to continued challenges with the COVID-19 pandemic, this year’s City Nature Challenge was a collaborative effort rather than a competition. Our Texas metros joined 419 other cities in a worldwide celebration of the resilience of urban nature that logged more than 1.2 million observations of 45,300 plus species made by 52,700 plus people.

Cumulative Impact

55% of all Observations Research Grade
More than half of the observations recorded during the City Nature Challenge in Texas metro areas were Research Grade — observations of wild organisms with photo or sound vouchers of a quality to merit a species-level identification by the majority of identifiers.

Over 2,500 Research Grade Observations of 128 SGCN Species
During the 4 days of the event, participants across all projects recorded over 2,500 observations at Research Grade of 128 Species of Greatest Conservation Need (SGCN). This may provide important insights into how SGCN species are using Texas’ urbanizing landscapes.

Number of Projects Doubles
In 2021, the number of projects in Texas doubled, bringing 6 new metro areas and 33 new counties into the City Nature Challenge, for a total of 14 projects covering 78 Texas counties.


The City Nature Challenge is organized by the California Academy of Sciences and the Natural History Museum of Los Angeles County.

California Academy of Sciences Natural History Museum of Los Angeles County