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People Looking at Nature

City Nature Challenge 2020: Baltimore

Get Nerdy with Nature

City Nature Challenge is back! Cities around the world—including Baltimore—will be competing to see who can make most observations of wildlife, find the most species and engage the most people.

Praying Mantis on a Hand

The 2020 challenge will take place in two parts: from April 24 to April 27, 2020, citizen scientists will observe wildlife and take photos of all the plants and animals they can find. From April 28 to May 3, 2020, the species documented will be identified. On May 4, 2020, the results will be announced! Will you help lead Baltimore to victory?

Help Baltimore to Victory

Join us in showcasing Baltimore's natural wonders to the world! Take the pledge and you will receive instructions on how to participate as well as reminders as challenge dates approach.

公和我做好爽As regional coordinator, the National Aquarium is committed to protecting, enhancing and restoring natural resources for the benefit of all people and wildlife throughout the Baltimore region. Part of that commitment includes knowing which species of wildlife live nearby and what sorts of habitats they need to thrive.

Baltimore City Nature Challenge Map of Area

In Baltimore City…and Beyond!

The National Aquarium is calling on citizen scientists to help explore, identify and document urban wildlife throughout the Baltimore metropolitan area. All observations made in the following counties and uploaded to during the challenge will automatically be counted towards Baltimore's City Nature Challenge totals: Baltimore City, Anne Arundel, Baltimore, Carroll, Harford, Howard and Queen Anne's Counties.

Ready, Set, Upload

City Nature Challenge Step 1

Step 1: Download the iNaturalist App

Download the and create a login.

City Nature Challenge Step 2

Step 2: Find Wildlife & Photograph What You Find

It can be plant, animal, fungi or any evidence of life such as tracks or shells.

City Nature Challenge Step 3

Step 3: Upload Your Observations

Share your observations by uploading your pictures to iNaturalist. All observations must be uploaded by May 3, 2020.

Track the Challenge (iNaturalist Feed)

公和我做好爽You can get involved in the Baltimore City Nature Challenge by joining a participating National Aquarium event, taking part in our partner organizations' events, or simply going for a walk outside! Read on to learn more about upcoming events near you.

the wildlife people are seeing in and around Baltimore today!

Thank You, Citizen Scientists!

Thanks to nature lovers like you, the Baltimore region had a tremendous showing in the 2019 City Nature Challenge! Collectively, 458 of you made 8,499 observations—a 60% increase from just last year!—and identified 1,268 species in and around Baltimore. With your help, 110 species were recorded on iNaturalist for the first time in this region. Once again this year, the most commonly reported plant species was garlic mustard, while the American robin was the most–sighted animal. Amongst regions of similar size (5,000 - 10,000 km²), Baltimore placed 5th in number of species recorded and 4th in number of participants, internationally. Out of 159 participating cities, Baltimore placed 35th in number of observations made and 31st in number of species identified—a very strong showing!


The City Nature Challenge Is Organized by:

California Academy of Science and Natural History Museum Los Angeles County Logos

If you have questions or if your organization is interested in partnering with us, please email