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Join 250 other cities from around the world in an effort to discover and record as many species across the Greater Sydney Region as possible from April 24th to April 27th 2020. This is the first year Sydney (or any Australian city) has participated in the CNC, so let’s showcase our amazing biodiversity to the world!

The Greater Sydney Region plays host to many differeny habitats, including banksia woodlands, mangroves, seagrass meadows and eucalypt forests. The region is also one of the most biodiverse in Australia, with over 3000 species recorded from Sydney Harbour alone! The observations you make will provide valuable data about the species that call Sydney home.


Are you a iNaturalist user in the Greater Sydney area? If so, look up our project ‘City Nature Challenge 2020: Sydney and join to get regular updates.

Hold an event

If you are involved in a group or interested in setting up a bio-blitz , Let us know, and we will add it to our list of events.

To help reduce the spread of COVID-19 and protect those who are most at risk, it is important that you take the recommended steps from the Australian Government to protect yourself and others. and the Limits on organised gatherings

The Team

The Sydney Chapter of the City Nature Challenge is organised by Alejandro Trevino and Thomas Mesaglio.

Alejandro is a passionate Environmental Urban Designer and principal of Praxis Urban, a Sydney based studio focused on the integration of nature in the built environment.  Alejandro has worked internationally for city shaping projects in Federal Government, State Government and the United Nations Development Program.

Thomas is a passionate science researcher and No. 2 top iNaturalist curator in Australia with over 59,000 identifications for Australian taxa. He is author of several science projects and e-books and tutor of UNSW Vertebrate Zoology, Biology of Invertebrates and Environmental Systems, Process and Issues.

Let’s build something together.

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