The Seattle Public Library invites children, teens and adults to take part in the City Nature Challenge by using the iNaturalist app to photograph local plants and animals. Learn how to use the app at two Library locations on Saturday, April 28.

Library events are free and open to the public. Registration is not required. Please bring a mobile device that can use apps and take pictures. To download the iNaturalist app, visit the iNaturalist project.


Wallingford Branch, 1501 N. 45th St., 206-684-4088.

  • 10 a.m. to 11 a.m. Saturday, April 28 – Woodland Park Zoo staff will lead us on a mini-safari through the Wallingford neighborhood to help get you started using the iNaturalist app.

Green Lake Branch, 7364 E. Green Lake Dr. N., 206-684-7547.

  • 11 a.m. to 1 p.m. Saturday, April 28 – Meet at the Library and walk over to the park to find and catalog wildlife as part of the City Nature Challenge using the iNaturalist app.



iNaturalist is an online social network of people sharing biodiversity information to help each other learn about nature. It's also a crowdsourced species identification system and an organism occurrence recording tool. You can use it to record your own observations, get help with identifications, collaborate with others to collect this kind of information for a common purpose, or access the observational data collected by iNaturalist users.

City Nature Challenge 2018

Which city on Earth has the most nature and the most engaged residents? The City Nature Challenge 2018 will help us find out! More than 70 cities on six continents are asking residents of and visitors to these urban areas to explore nature all around them and document the species they find - see the full list of cities at City Nature Challenge.

The City Nature Challenge will have two parts: taking pictures of wild plants and animals from Friday, April 27 to Monday, April 30; and identifying what was found from Tuesday, May 1 to Thursday, May 3. Results will be announced on Friday, May 4.

During the 2017 City Nature Challenge, in Seattle people logged 1555 observations representing 425 species.