Warren Farm Nature Reserve Bioblitz 🌿 In Person Event – 25 April
🌍 Join the Bioblitz Challenge. Connect with Nature. Contribute to Science.
We're back! and this year, we're going bigger.
Join us for a fun outdoor experience as we explore the biodiversity of Warren Farm Nature Reserve in Ealing and contribute 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. Together, we'll connect with nature, make meaningful wildlife observations using the iNaturalist app, and help put London on the biodiversity map.
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!
🌍 Why It Matters
🌱 The biodiversity crisis is real - and happening in our backyards.
🧬 This event lets you directly contribute to urban nature data used by researchers.
💚 We believe that regenerating cities starts with reconnecting with nature.
🎒 What to Bring
Comfy walking shoes & weather-appropriate clothing
Reusable water bottle & some snacks
Some cash or card to purchase food and drinks
Fully charged phone with iNaturalist app
Curiosity & community spirit!
🎟 Registration
🔹 Registration is required to help us manage numbers and ensure a good experience for everyone.
🔹 Spaces are limited, so book early to avoid missing out.
🔹 Full joining instructions will be sent the week before the event, including what to bring, where to go, and how to prepare.
Questions? Contact the Regen City organising team at [email protected]
Let’s move London up the leaderboard for City Nature Challenge 2026 - and have fun doing it 🌱🐝🦋
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, as well as 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 — and aim 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 by embedding senior marketing, operations and product expertise directly into founding teams.
Our ecosystem events are where our work comes to life - bringing together founders, innovators and champions at the intersection of nature, innovation and cities to spark connections and conversations that accelerate regenerative solutions.