Blog by David Mason, National Trust - Suffolk and Essex Coast Ranger

During the Autumn/Winter 2023-4 the Eastern fields of Northey Island hosted large numbers of migrating waders and wildfowl as the grass fields changed into intertidal mudflats. 

Wetland Bird Survey (WeBS) counts over the winter have counted a wide variety of birds using this area to feed and roost. Curlew, redshank, dunlin, ringed plover, greenshank, black-tailed godwit, lapwing have been regular visitors.

On one day in October, as the tide came in, I observed a large flock of Lapwing settling on the grass at the water’s edge. An avocet sifted the mud in the new tidal lagoon and little egrets stalked and stabbed their fish prey in the shallow water. Widgeon, teal, brent geese and shelduck floated on the shoreline. A kestrel perched on a nesting platform.

As the tide ebbed they were joined by golden plover that came in to roost on the mud.  Disturbed by a passing marsh harrier the flock wheeled over the island, glinting in the sunlight, with a rush of massed wingbeats as they passed.

Viewed from the new hide over several hours, with a flock of brent geese chattering in the fields behind, this spectacle seemed to me to be the culmination of all the work to let the tide into this area. This is an area in transition however and will not remain a mudflat for long although the steady accumulation of mud is vital for the building of stable saltmarsh, which will form a different but still vital habitat for birds. 

Building saltmarsh.
​The principal objective of the project on the island is to protect and create saltmarsh, following on from experimental work in 1991 to carry out the first managed realignment in England on the island.

Recent surveys have shown that saltmarsh plants are steadily colonising the new intertidal areas. Pioneers like samphire and annual sea-blite have been the first to move in on the bare mud, with saltmarsh grasses, sea aster, spear-leaved orache, sea couch, sea spurrey, sea beet and sea purslane establishing on higher ground.

​Art on the island.
We are running a series of new art events on Northey Island to help raise awareness of the work we’re doing to tackle climate change and rising sea levels.
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Northey Island is the largest single block of saltmarsh habitat in the Blackwater Estuary, Essex and has been at the forefront of coastal adaptation for the past 30 years.

Since 2020, the National Trust has been undertaking the biggest habitat creation project in the island’s history to help the area better withstand climate impacts.

We’ve teamed up with Sara Hayes of the Public Art Company to deliver a series of interactive, family-friendly events. Throughout 2024, Sara is leading a series of walks and workshops that explore Northey Island’s unique habitats. This will eventually culminate in the island’s very own installation of public art.

Links to previous blogs about Northey Island
​Part 1:  www.projectlote.life/news/northey-island
Part 2:  www.projectlote.life/news/ntconservationadaption
Part 3: https://www.projectlote.life/news/ntwatervoles​
Part 4: www.projectlote.life/news/northey-update

Blog by Kieren Alexander, RSPB Site Manager for Old Hall Marshes

It was a fantastic year on the newly created beach at Horsey Island. For those not familiar with this project, this was the creation of a new beach for little terns and other beach nesting birds to breed on, using 50,000 cubic metres of sand and shingle from the major channel deepening project carried out by Harwich Haven Authority.

Along with providing breeding habitat for little terns and other beach nesting birds, the aim of the recharge scheme was also to help reduce erosion of the saltmarsh at Hamford water. This protected habitat, is vital for carbon storage, aiding in the fight against climate change. The project also assists in providing a natural wave break for the wider Hamford Water area, absorbing the energy before the waves reach the mainland and reducing pressure on the surrounding seawalls.

Nesting on beaches, Little Terns are highly vulnerable to disturbance and erosion exacerbated by rising sea-levels throughout their breeding grounds. The project at Horsey Island, raises the height of a shingle beach out of the reach of the highest tides and hopefully secures this nesting location for the next 60 years.

Below is a little video on how we created this new beach:

Now in its 3rd year and approaching its 3rd breeding season, it is time report back on the results from 2023’s breeding season; in total 28 pairs of Little Terns successfully raised 42 chicks during this year’s breeding season at Horsey Island in Essex. Figures indicate that this year has seen the highest number of chicks taking to the skies since 2006.  
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The site has also provided valuable habitat for other species including a Common Gull which fledged one chick this year from Horsey and is a rare occurrence in Essex and is possibly the first to have bred in Essex.

This is an incredible result and a real success for all the organisations involved in the management of the beach from Tendring District Council, who warden the site and the wider Hamford water embayment, the landowners and HHA and the Environment Agency who helped fund the work.

We will continue to monitor the beach both ecologically and geo-morphologically, with one final drone survey this Spring before we move to an annual monitoring drone flight to see how it is evolving over time and continued annual monitoring of the little tern population led by Tendring District Council and with the assistance of the landowners.


In case you missed it, here is the link to first part of Horsey Island Recharge Project blog, the second part, the third part and the fourth part.

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Video credits: Jim Pullen/RSPB

Blog by David Mason, National Trust - Suffolk and Essex Coast Ranger

April 2023 was an exciting month for the Northey Island Coastal Adaptation Strategy and the LIFE on the Edge project. After several years of planning and preparation the final parts of the embankment were lowered on April 28th and the tide came into the new starter creek, finally overtopping onto the Eastern fields at high tide on the 4th of May. Hurrah!

We have timelapse cameras on site to record progress and these are quite useful in comparing before and after photos.

​​This photo shows the ‘before’ of the pond the water voles were translocated from, with Brent Geese settled in the field. The area on the right is the location of the first managed realignment in England carried out in 1991, which laid the foundation for later realignment projects around the country.

​This is the same view after the embankment was removed, showing the tide coming over the 1991 realignment.

​On particularly high tides the incoming water covers the lowered embankment and spills into the pond. Here little egrets and other wading birds can be seen in the shallows.

​May the 4th be with you. The forces of nature take charge at Northey as the first high tide overtops the new starter creek onto the Eastern field.

​Saltmarsh plants have already begun growing in the Eastern field, predominantly along the edges of the creek and scrape, whilst birds including lapwing, little egret, redshank and greenshank make use of the new intertidal area

Bank Reprofiling

The bank in the Northern field has been reprofiled with a shallow back slope to make it more resilient to overtopping by the tide during storm surges.  Capped with topsoil from on site this will quickly regenerate and forms part of a new circular walk around the site, open April through to September. A new borrowdyke has been dug out further inland.  This drains the field and links to an outlet pipe with flap valve that takes excess water into the saltmarsh.  The ditch contains a deeper pond area for freshwater wildlife. The field has been re-fenced and will continue to be used for hay making and grazing which keep the grass in good condition for brent geese, lapwing and curlew to use in the winter.

Water vole update-
As the landscaping work has finished, the fencing to keep the water voles in their new pond has been removed.  It now looks like part of the landscape and the voles are free to roam into the network of freshwater ponds and ditches.

Fish survey training

​National Trust staff undertook fish survey training with Steve from the Institute of Fisheries Management.  After laying out fyke nets in the creeks at low tide, we trawled a tidal pool with a seine net while waiting for the tide to rise and bring the fish in to the creeks.  The seine net caught a range of small fish including common goby, bass, thin lipped grey mullet, gold grey mullet, stickleback, prawn and shrimp.  Larger bass were caught in the fyke net nearest the seaward end of the creek. The surveyed marine life were returned to the creeks and scrapes following identification to continue their journeys around the estuary and further afield.
 

Links to previous blogs about Northey Island
​Part 1:  www.projectlote.life/news/northey-island
Part 2:  www.projectlote.life/news/ntconservationadaption
Part 3: https://www.projectlote.life/news/ntwatervoles​
Part 4: www.projectlote.life/news/northey-update

Blog by David Mason, National Trust - Suffolk and Essex Coast Ranger

‘Working with the grain of nature yields the best chance of maintaining a healthy and beautiful coast for the future, a coast that is great for people and for wildlife.’ – Northey Island Coastal Adaptation Strategy Project Vision

The UK government has recognised the importance of the East Atlantic Flyway, a migratory bird route over western parts of Europe including Yorkshire, Lincolnshire, Norfolk, Suffolk, Essex and Kent. In recognition of its vital importance to bird populations and wildlife it has joined the list of seven sites put forward to join the list of World Heritage sites. The area sees huge transient bird populations pass through every year as the seasons change, and the River Blackwater in Essex, including Northey Island, is one of its hotspots.

More space created for birds.
The overhead powerlines across the island were removed last year and replaced  with underground cables. Once the flightline was clear the brent geese that winter here, along with lapwing, curlew and godwit, began using the eastern and southern field, areas of the Island they had previously avoided. The highest number of geese since 2015 (1710) was recorded on the WeBS count, along with the highest count ever of dunlin (3875) roosting at high tide. 

​Following the managed realignment, this area in the eastern field is designed to be underwater at high tide. It will retain water when the tide goes out and will develop as a saline lagoon. The geese enjoyed the shelter of the sea wall over the winter and used all the grassland on the island.

​North West Wall beneficial use of dredged sediments (BUDS)
Further sediment dredged from Maldon harbour has been placed to enhance the saltmarsh in this area as part of an ongoing project.  

​Oystercatchers nested just beyond the placed mud on a patch of gravel. We are hoping other birds may use the new nest boxes placed on top of the cut down power poles left in the eastern field. 

​Water vole update
Pond marginal vegetation is well established in the main new pond and is providing food and shelter for the translocated voles. A pair of mallard also nested in the vole enclosure and hatched 10 ducklings.

​Signs of water voles burrowing in the pond banks and feeding have been found with the characteristic diagonal cut on the small piles of vegetation. Later in the year they will pull these into their burrows as a winter food source. 

​A new extension fence has been installed along a connecting ditch to allow population expansion and accommodate any further voles found during the continuing works. The fencing installed to contain the voles will be removed when the works are finished, and they will have access to all the freshwater bodies on the island.

​Telling the story of Saltmarsh, Migration and Managed Realignment
New interpretation boards have been installed in the hide and on a viewing platform, with a a new bench overlooking the River Blackwater towards Maldon and Heybridge. The three boards illustrate different aspects of the island’s environment. The first board explains the importance of saltmarsh for biodiversity, flood protection and carbon storage and the second highlights the East Atlantic Flyway used by migratory birds. The third board illustrates the work of the LOTE project to realign some of the sea walls to create 10 hectares of new saltmarsh and protect 50-60 hectares of saltmarsh for the next 100 years, predicted to have been lost to the effects of climate change without action.

​Another new hedge and pond created
276 hedge plants were planted in total and included hawthorn, hazel, wild honeysuckle, spindle, field maple, buckthorn, hornbeam, cherry plum and blackthorn. These species were selected to provide a good variety of fruit, blossom and year-round interest, so will hopefully increase the food sources available for birds and insects on the island. These have been weeded and mulched by the Essex and Suffolk Volunteer Group along with removing old barbed-wire and litter from the saltmarsh. Three new ponds have been created, linked by a connecting ditch, in the north east corner of the island. They have attracted yellow wagtail and mallard.

Links to previous blogs about Northey Island
​Part 1:  www.projectlote.life/news/northey-island
Part 2:  www.projectlote.life/news/ntconservationadaption
Part 3: https://www.projectlote.life/news/ntwatervoles​

Blog by  Dave Blackledge - Site Manager, RSPB Cumbria Coast Reserves

RSPB Hodbarrow, on the side of the Duddon Estuary in Cumberland, is the site of an important colony of Sandwich, Little and Common Terns.   They breed on land formerly occupied by one of western Europe’s largest iron mines and began nesting there as the mines closed over 50 years ago.  Predator fencing and warden protection has seen increasing numbers of seabirds breeding on the island created on limestone slag with vital protected space at a premium.  The Life on the Edge project has been helping create more space for our colony to expand.

At the start of the project in 2020, we constructed a new island and carried out work to increase the size of the existing one, giving us around 0.75 ha of extra breeding habitat, protected by anti-predator barrier fence.  Work has continued this winter to further increase the opportunities for breeding seabirds by creating a third island of 0.25ha. and provide a line of marker buoys along our boundary with the neighbouring caravan park to reduce the incidence of boat disturbance near the islands.

The coastal iron mines were enclosed by a seawall at the start of the 20th century to protect works from flooding and thousands of tons of limestone slag from the nearby smelting works were dumped within the wall, providing an ideal substrate for nesting terns when the works were flooded following closure in 1968.  Island creation on site therefore centres around lowering, moving and cutting off areas of the slag bank to create disturbance free areas.
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This increased space has already begun to prove beneficial to a number of species.  As terns, Black-headed Gulls and wildfowl began to increase behind the initial predator fence deployed in 2016, Little Terns in particular found it difficult to find space away from other species with their tendency to nest in a more dispersed pattern to other species.  The first island created in 2020/21 has attracted most of the 60 or so pairs of common terns to breed creating space for little terns to expand.  This season we have a peak of 53 pairs of little terns – a record for the site, and young are beginning to hatch at the time of writing.

​With HPAI hitting some Sandwich Tern colonies hard, we are delighted to have 596 pairs currently hatching young on site – a little down on recent years, but probably expected with a presumably reduced UK population this year.  Creating several islands also has the advantages of reducing the chance of predation – any breach of the predator fence would only allow foxes access to one area of the colony – and separating the colony into areas where interaction and movement will be restricted which may help prevent the spread of HPAI throughout the entire site.
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Eiders too, have benefitted greatly from the works.  With historical averages of around 5 nests, increased breeding space and predator fencing has increased this to 73 pairs, with several large creches seen escaping over the sea wall to the estuary in recent weeks.  Along with 2 pairs of Arctic Terns, 12 pairs of Oystercatchers, 9 pairs of Lapwings and 4 pairs of Ringed Plover the busy breeding islands are proving a valuable haven for seabirds along the Cumbrian coast.