Join ActForEaling partners Warren Farm Nature Reserve and Brent River Park for a fun outdoor experience exploring the biodiversity of Warren Farm Nature Reserve in Ealing on 25 April. Also you will be making a contribution to a global citizen science initiative: the City Nature Challenge 2026.
​This event is hosted by Regen City and The Green Londoner in partnership with Warren Farm Nature Reserve and Brent River Park.
​This in-person BioBlitz is part of London’s four-day City Nature Challenge recording window (24–27 April), during which cities around the world join forces to document urban biodiversity. Your observations will contribute to open datasets used by researchers, wildlife organisations, and local councils to help drive nature recovery.
​Whether you’re a first-timer, a seasoned nature spotter, or somewhere in between, come be part of a friendly, nature-positive gathering that blends discovery, community and purpose.
🎯 What to expect:
- ​A Guided Nature Walk through Warren Farm Nature Reserve in Ealing
- ​Hands-on experience using the iNaturalist app for species identification and contribute real data to the global City Nature Challenge
- ​A chance to meet like-minded climate and nature professionals
- ​Friendly competition and collaboration!
Places are limited to attend on on Saturday, 25 April 2026, 10am to 12.30pm is essential. Please see the Regen City information and booking page here.
Warren Farm
​Warren Farm Nature Reserve is a rewilded urban grassland and wildflower meadow habitat, recently designated a Local Nature Reserve. It is home to around a quarter of London’s breeding skylark population, which nest on the ground. It is also home to a remarkable range of common, vulnerable, and rare species of plants, insects, arachnids, and more.
​The Global City Nature Challenge + iNaturalist App
​The City Nature Challenge is an annual, global, citizen science competition to document urban biodiversity. The challenge is a bioblitz that engages residents and visitors to find and document plants, animals, and other organisms living in urban areas. The goals are to engage the public in the collection of biodiversity data. With three awards each year for the cities that make the most observations, find the most species, and engage the most people.
​Participants use the iNaturalist app and website to document their observations.
About The Green Londoner
​The Green Londoner is a community-driven media platform dedicated to making London greener, healthier, and more sustainable. We spotlight local solutions to the climate and nature crisis from green policies and grassroots projects to everyday lifestyle tips. The aim is to inspire Londoners to take action where they live. Through stories, interviews, events, and practical advice, we help connect people to the environmental issues that matter most in the city.
​About Regen City
​At Regen City, we help climate and nature innovators build stronger foundations and scale faster. We do this by embedding senior marketing, operations and product expertise directly into founding teams.
​Our ecosystem events are where our work comes to life. We bring together founders, innovators and champions at the intersection of nature, innovation and cities. Here we spark connections and conversations that accelerate regenerative solutions.
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