Tag: Oystercatcher

Fieldwork January / February 2025

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Friday 31 January

The trip kicked off with a number of team members arriving early, allowing for resighting and a recce on the Friday morning tides. Lys and Cathy checked Heacham North North, North and South beaches and Hilary investigated Snettisham whilst Nigel and Richard went to recce Sailing Club Bay, finding roughly 2,500 –3,000 Oystercatchers roosting. Very promising for a good catch! In the afternoon the net-setting team consisting of Nigel, Richard, Molly, Jerry, Cathy, Lys, Hilary and the Film Crew went to Sailing Club Bay, setting both a full and half large-mesh net with the camera crew preparing for the following morning. Cathy kindly led the cooking of dinner for the evening so the later arriving team could have a lovely meal before an early night.

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Record-breaking Oystercatchers caught on The Wash

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The core of our research work on The Wash is monitoring the birds that rely on its mudflats and surrounding habitats. We started catching and ringing waders 70 years ago, when we were simply trying to work out their migration routes and breeding grounds. Now we still aim to catch our study species regularly and continue to learn about migration, but we also check the ‘health’ of the population: are they putting on enough weight for the winter or have they completed their moult on time? How do they move around The Wash? Our regular catches help us to answer these questions, as well as allowing us to keep track of the survival rates of a range of species.

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Groupd of people sitting on a sandy seawall in warm orange light, by Sam Franks

Fieldwork March 2023 (part 1)

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Friday 10 March

Lizzie and Guy braved the freezing winds to recce at first light. Guy walked south from Heacham to view Heacham South beach from one viewpoint, whilst Lizzie walked north from Snettisham car park to check Snettisham and gain a different view of Heacham South. Despite normally being a prime spot for Oystercatchers, only 10 were present close to the usual catching area just south of the tump. Clearly sheltering from the inclement conditions, they were hunkered down amongst the tidewrack at the top of the beach. Guy visited Heacham North, to find another 60 behaving much the same – just 100 m north of the South beach access point. It was noted this was unusual behaviour for the roosting birds, as this area is often very busy with visitors. Guy then went on to Heacham North North beach and found 90 Oystercatchers split into three groups – 60, 20 and 10. Additionally, there were ca. 100 Turnstone, Sanderling and Ringed Plover scattered across the beach. Almost no beach was visible at this point, because of the unusually strong wave action and tide height. Again, the birds were right on the upper edge of the beach along the tidewrack – their behaviour clearly being affected by the strong winds.

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Group of people ringing birds, by Sam Franks.

Fieldwork February 2023

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Friday 24 February

Recces

Cathy recced on Friday morning. Snettisham and Heacham beaches were being ‘recharged’ (moving sand onto the beach, before the start of the tourist season) and there were also reports of Peregrine and Gyr Falcon at Snettisham Pits. These events may have affected birds’ movements, but Oystercatchers were seen on all the beaches recced, with the birds on Heacham North North being the most reliable. A few Turnstone were also seen, the majority at Heacham South beach, where a flock of ca. 200 Bar-tailed Godwits were also observed.

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Photo showing an Oystercatcher with progressive greying. The bird is being held, showing its face and bright orange bill. Photo by Sam Franks.

Why is that wader white?

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We all occasionally see birds with some white feathers and, unless the bird has no colouring at all (albino), we generally put the lack of colouring down to leucism – an absence of pigment in some feathers. However, it’s not that simple – there are number of different types of lack of pigment (van Grouw 2021).

Photo of a leucistic Knot amongst standardly coloured Knot at Snettisham Pits in Norfolk. Photo by Rob Pell
Two other birds with ‘white spotting’ seen on the Wash, both at Snettisham. Photos by Rob Pell
Photo of a leucistic Oystercatcher roosting with other Oystercatchers with standard plumage at Snettisham Pits in Norfolk. Photo by Rob Pell
White-spotted birds are seen regularly, but it is rare for us to know if the cause is leucism or ‘progressive greying’.
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