Ghosts and bats

Archie Ruggles-Brise • 9 September 2024

A spooky summer at Spains Hall Estate!

By Sarah Brockless

Summer did eventually arrive and I managed to do my first survey work in the relative dry of July! It has become a standing joke in the Spains Hall Estate team that if I decide to check my Dormouse footprint tunnels, then the heavens open! However, the arrival of dry weather meant that once again we could get a digger in, ably manned by local contractor Andrew Hull, to dig out a ghost pond; a pond that has been filled in at some point over the decades, but there are clues as to its historic presence on the ground if you look carefully.


I discovered this ghost pond by accident, field-walking during wet winter weather. Whilst ecologists tend to be out and about more in the spring and summer when everything is growing and breeding, there is a lot to be said for a winter walk. You notice different aspects of the land, such as hedgerow and woodland structures, visible without the leaf cover, wintering bird flocks, soil erosion rills and areas that lie wet. The ghost pond was a perfectly round circle of water in an arable field, which in my mind raised a question. Once home, in dry clothes, and with the essentials in life – a pot of tea and chocolate, I looked at the historic maps, and sure enough there was an old pond marked in that exact spot.


A chat with FWAG East’s, Jilly McNaughton, who administers the Essex District Licensing Scheme set the digger wheels in motion to restore the pond. Jilly made a great video of the whole project. In the two ponds we restored last January, we already have a plethora of aquatic invertebrates, dragonflies, amphibians and marginal plants. We also discovered that several species of bats were already using the ponds.


During May and June, Ella Gibbs (pictured) and Pete Claughton of the Essex Bat Group braved dizzy heights climbing up trees to erect bat detectors along the Finchingfield Brook, to provide baseline data for our new beaver enclosures.


We also decided to erect some detectors in the ancient semi-natural woodland. When the woodland located detectors logged out at 19,999 records in a week, it did cross my mind that it might be just one very energetic bat flying back and forth a lot! As it turned out, on the subsequent bat walk, we heard and saw different bat species repeatedly flying across and around the newly restored woodland pond feasting on the many associated invertebrates.

Duly impressed with the records, Essex Bat Group volunteer, Graham Hart, arrived one balmy, still, late summer evening, with a car boot full to the brim with equipment and four keen helpers, Ana Pino-Blanco, Hayley, Sarah & Yvonne, to put up two large mist nets across woodland rides, along with a harp trap next to the pond (pictured).


We all brought deck-chairs, and in my case, also the essential flask of tea and chocolate. I had just poured my first cup when the team leapt into action with our first catches of the evening. We caught bat after bat, namely a Soprano Pipistrelle, Natterer’s and Barbastelle’s (pictured below)– for the latter two, mostly females, which means there are likely to be rare maternity roosts on the Estate.


There was no deckchair work at all, but instead the happy murmur of bat workers measuring, recording and weighing these amazing small mammals. I was amused to learn that our bats were considered quite heavy…with the word ‘fat’ mentioned several times. Whilst my imagination was immediately filled with thoughts of getting the Estate bats into leotards, sweat bands and a keep fit class, in all seriousness, their healthy weight simply reflected the high quality woodland habitat and invertebrate abundance that results from good woodland management. By contrast, I was slightly slimmer by the end of an exciting evening with my chocolate still lying untouched in the deckchair!

When I have investigated the official biodiversity records for the Estate, there are few species records, and even fewer priority or rare species. This isn’t unusual for a historic shooting Estate, nor for a landscape that has been intensively farmed for many generations. Yet here we are with rare Barbastelle bats happily sharing the woodland with a population of priority species Marsh tits, punching well above their diminutive size with their incredibly large territories. I also nearly trod on (thank goodness for my sized 3.5 feet!) a Greater Butterfly orchid in one of the woodland rides during a wet late May day. The species hasn’t been recorded in the Finchingfield area or well beyond since 1889! This old specimen, collected by amateur botanist, Eliza Vaughan (1863-1949) is stored in the Natural History Museum, London. It does beg the question; how much biodiversity within our landscape is simply undiscovered or unrecorded, rather than absent?

Latest news

by Archie Ruggles-Brise 9 December 2024
By Sarah Brockless (Estate Ecologist) 9th December 2024
by Archie Ruggles-Brise 18 October 2024
New tool makes working out which NCA you are in far easier
A field of flowers
by Archie Ruggles-Brise 11 July 2024
Essex farm Spains Hall Estate have completed what is believed to be the first off-site Biodiversity Net Gain (BNG) deal in Braintree District in north west Essex
Afield of red scarlet clover
18 June 2024
🌻🌳🐞 Wildlife warblings 🌻🌳🐞 Larking about in wellies By Sarah Brockless (Estate Ecologist)
by Archie Ruggles-Brise 29 April 2024
🌻🌳🐞 Wildlife warblings 🌻🌳🐞 Volunteers, Marsh Tits and Oxlips By Sarah Brockless (Estate Ecologist)
by Archie Ruggles-Brise 25 March 2024
A project to reintroduce beavers to East Anglia has proven its worth, with the beavers successfully reducing the impact of flooding and drought by storing millions of litres of water over five years. Five years ago, Spains Hall Estate in Essex worked with the Environment Agency to release the first pair of beavers in East Anglia for over 500 years. With free reign across a 10-acre woodland stream, the beaver family, now numbering 11, have created nine dams which are estimated to store 3 million litres of water in ponds covering almost a quarter of the woodland. An animation produced by catchment-scientists from AtkinsRéalis reveals the scale and speed of the changes occurring over five years. Data collected by Kings College London demonstrates that the way water flows across the farm has also changed, with the beavers increasingly building bigger dams to trap more water each time it rains. These changes mean that storm water now flows downstream more slowly, some even being held for several months as it’s slowly released back into the river, helping alleviate low river water levels in summer. Matt Butcher, Environment Agency Catchment Manager, said: “We are delighted that the beavers have thrived and improved the landscape. Their work has demonstrated that nature-based solutions can be used to tackle challenges in smaller river catchments. We initially supported this work as a pilot study and have been really impressed with the results. We have since helped the estate scale up their beaver activity through more direct support, along with other partners, which has enabled the construction of two much larger beaver enclosures.” Molly Howell, Assistant Environmental Scientist at AtkinsRéalis, who produced the animation, said: “The animation is such a powerful tool to convey such a dramatic change in a simple way. The chance to track beaver-led changes over such a long time period has been a great opportunity for us. It means we have real-life insights which we can use to support both Estate and their partners, but also bring to our wider work. It’s a great example of how we’re able to use digital tools within a natural environment to enhance our understanding of what’s happening on the ground, and use that data to better inform how we support the project.” Archie Ruggles-Brise, Spains Hall Estate Manager, said: “This is a massive milestone for us. We took a chance 5 years ago that bringing beavers back would be beneficial, and it’s proven to be better than we could ever have imagined. Locally there is widespread support for the beavers and their work, with the community really taking them to their heart. You can even find beaver greetings cards , beaver beer and beaver-themes on local menus!”
by Archie Ruggles-Brise 8 March 2024
Today, Spains Hall Estate is celebrating International Women’s Day, with good reason!
Brown hare at Spains Hall Estate
12 February 2024
This week, whilst trying to count the large, swirling bird flocks frequenting our winter food cover for the annual GWCT Big Farmland Bird Count, I accidentally disturbed a hare laying up against the elements in a form, a shallow depression they dig. The hare sprang into action....
by Archie Ruggles-Brise 11 January 2024
Independent report calls for 10 steps to recover our water environment
by Archie Ruggles-Brise 11 January 2024
Green Finance Institute's 'Farmer Toolkit' features 3 estate case studies
More posts