Tag: The Wash

A groups of Curlew feeding in shallow water. Three of the birds have white, uniquely marked flags on their legs, enabling researchers to identify them.

Curlew and Bar-tailed Godwit feeding locations on The Wash: do you like your worms with or without salt?

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If you have taken part in WWRG winter fieldwork over the past twelve years, you know that one tide of each fieldwork weekend is dedicated to resighting colour-marked birds. We have been applying leg flags to Bar-tailed Godwit since 2010, and Curlew since 2012, with over 200 people reporting one or more flag sightings. We use individual leg flags to both add to the survival data generated from metal rings (see Cook et al. 2021) and to look at how individual birds use the Wash and the surrounding area. Our first paper analysing how birds move around within the Wash has just been published in the journal Wader Study (Pell et al. 2023).

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Newly ringed Curlew about to be released, by Cathy Ryden

Why The Wash is so important for Curlew: selected stories from over 60 years of Wader Study

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Curlew are declining so alarmingly that they are now ‘Red-Listed’ as birds of conservation concern. The Wash is one of the two main UK sites for both passage and wintering Eurasian Curlew (the other being Morecambe Bay – WeBS data). Autumn passage birds use the intertidal mudflats to feed on polychaete worms, shellfish and Green Crabs. Some birds will move on to smaller sites around the Norfolk coast, the southwest of England, and northwest France. Here they will spend the winter before returning to their breeding grounds. The majority of Curlew using the Wash breed in Finland and Sweden, a migratory journey of over 1,000 miles. There is more background information on our Curlew page.

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Juvenile Oystercatcher on beach

Oystercatchers and shellfish

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Back in the winter of 1992/93 Wash Group members noticed far more Oystercatchers than usual were feeding inland – on grass verges, in the middle of roundabouts and on the lawn at Sandringham. The Oystercatchers we caught had stopped moulting part way through, presumably to preserve energy and we found many hundreds of corpses on the shore. This led to an investigation of what had happened and, of course, the answer was complicated – but WWRG data helped to unravel the mystery. The Oystercatchers had encountered a ‘perfect storm’ of unusually cold weather combined with low stocks of both Mussels and Cockles – the preferred food of many of them – and a popular human food as well. Work with BTO, Eastern Inshore Fisheries & Conservation Authority (EIFCA, then the Eastern Sea Fisheries Joint Committee), the Centre for Environment, Fisheries and Aquaculture Science (Cefas) and Richard Stillman at the Centre for Ecology and Hydrology (CEH), showed the importance of balancing numbers of shellfish taken by the fishermen and the birds to ensure that there were sufficient for both as well as maintaining a breeding stock of shellfish, so that the supply continues. Understanding these balances, what might change them and how to react to changes (Adaptive Harvest Management) is a vital part of managing fisheries.

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An inflatable flamingo sitting on saltmarsh, by Chantal Macleod-Nolan

Fieldwork September 2021

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Monday 6 September

On Monday the team started to gather properly around lunch time as plans had been made to try for a catch of Grey Plover at Gedney that evening. Cathy had been at the Norfolk base for a couple of days so the house was well set up and ready for everyone to arrive, which soon included Tim, and they got the ‘party tent’ up and ready outside. Katharine arrived next followed by Caroline and Hilary and soon Steve, Alex, Luke, Sarah and Chris were also there. Tents were put up by those who needed them and a baked potato lunch was well appreciated by all (thank you Cathy!). The net set was sorted out for the evening’s catch and, once Sabine arrived, the team headed off to Gedney around 2.20 pm meeting Richard, Ryan and Lizzie there. The single net was set out on the pool identified at the previous Wash week and soon the team was waiting under a tarp for the tide to bring the birds in. Sadly the birds just weren’t quite settled and, with the tide in, the team had to give up for the day and headed home to dinner. During dinner it was confirmed that the licensees thought it was worth a second try at Gedney in the morning so soon everyone headed to bed.

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Snettisham Beach with moody sky, by Rob Robinson

Is climate change affecting Wash waders?

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As CoP26 (the 26th annual Conference of Parties signed up to the UN’s Convention on Climate Change) gets underway in Glasgow, all eyes are on the global response to climate changes and whether national governments can come together to reduce global Carbon emissions sufficiently to avert some of the frightening effects predicted of ‘Business as Usual’. With most world leaders and tens of thousands of delegates discussing everything from atmospheric physics to social justice, such gatherings can seem a world away from the tranquil vistas of The Wash. But already we are seeing the effects of climate change, and the data archives of the Group, as well as research by Wash Group members has been vital in documenting these.

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