Morden Hall Park Nature Group

Grey heron by waterwheel at Morden Hall Park

Our Nature Group is made up of adult volunteers that are passionate about nature. The group runs species surveys and walks to record the wildlife that lives in the park.

The Nature Group surveys wildlife, holds monthly open meetings, runs events and meets regularly on Sundays to walk through the park. Contact us to find out more or to apply to join us as a Nature Group volunteer.


Our butterfly surveys in the park take place from April to September each year. These take place on Sunday afternoons, weather-permitting. Our results indicate how butterflies are doing here in the park, and the group submits them to a national record so that they contribute to understanding why many species of butterflies are in decline across the UK. 

The survey methodology is based on the UK Butterfly Monitoring Scheme, following a set route called a transect. You can view our transect map here:

Morden Hall Park butterfly transect map (PDF / 3.8095703125MB) download

Riverfly Monitoring

Each month the Nature Group surveys our allocated site on the River Wandle as part of the Riverfly Monitoring Initiative, in partnership with the Wandle Piscators. Following a set method, mayflies and caddisflies are recorded, which are pollution indictator species. This is a national recording scheme, and locally the data is used to monitor the health of the river that flows through the park. 


Our monthly morning bird walk along a set route records all the birds that are seen and heard. These results are submitted to the British Trust for Orinithology (BTO), along with one-off (incidental) sightings across the year.


On some warm summer evenings the Nature Group sets up light traps out in the park to catch moths, and then records the species found. 


When dragonflies and damselflies are seen out in the park these are recorded and sent to local dragonfly recorders. Dragonfly species from our nearby nature reserve Watermeads are also recorded. We hope to see lots more in Morden Hall Park now there is a large pond beside our boardwalk

Monthly meetings

The Nature Group holds open meetings once a month on the third Thursday at 7pm in the Snuff Mill. These give group members and visitors an opportunity to discuss recent surveys, sightings and discuss involvement in park conservation work and events. 

Upcoming event: BioBlitz 2-3 June 2018

From 10am on Saturday 2 June to 4pm on Saturday 3 June, become a wildlife explorer and discover what’s living right on your doorstep by joining in at Morden Hall Park. Our annual BioBlitz events bring together staff, volunteers, experts and visitors together to record as many different species of birds, bugs, plants and beasties as possible before the clock runs out.

With interactive activities for kids, grown-ups, beginners and experts alike, there is something for everyone at BioBlitz.

For bookings and further information visit:  and the National BioBlitz website at