City Nature Challenge

Cities around the world will be competing to see who can make the most observations of nature, find the most species, and engage the most people in the 2020 City Nature Challenge.

In light of the COVID-19 pandemic, we have made some modifications to the City Nature Challenge to help keep our organizers and participants safe. Firstly, this year’s CNC is no longer a competition. Instead, we want to embrace the healing power of nature and encourage the collaborative aspect of the CNC. This will allow people to safely document biodiversity in whatever way they can, even from the safety of their own homes if necessary. We urge all participants to carefully follow public health guidelines provided by your local governments, as they are changing in real-time. Individual safety and public health are our utmost priority. Please refer to our COVID-19 FAQ page for more information.

The 2021 City Nature Challenge takes place in 2 parts

April 30 -

May 3

Taking pictures of wild plants and animals.

May 4 -

May 9

Identifying what was found.

To see a list of participating cities, click here
Results will be announced on Monday May 10th.

Taking Part is Easy

Find Wildlife

It can be any plant, animal, or any other evidence of life found in your city.

Take a Picture

Take a picture of what you find. Be sure to note the location of the critter or plant.


Share your observations through iNaturalist or your city's chosen platform.

Exploring wildlife during COVID-19

2020 Collective Results



Cape Town, South Africa

53,763 observations



Cape Town, South Africa

4,588 species



San Francisco, CA, USA

1,947 participants

View all past winners >