Tag: ringing

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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Sunrise over a misty saltmarsh, by David King

Fieldwork January 2023

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Friday 20 January

At 13:00 Mark went to recce on Heacham South beach. At this time the tide had a long way to come back in and there were lots of Oystercatchers out on the mud. Strong onshore wind and waves caused the birds to come quickly off the mud and onto the beach. Mark observed five separate groups of about 100 each. Some of the birds moved right up to the previous tide line before high tide arrived while three of the groups stayed at the water’s edge. Unhappy with the large amount of people and dog walkers on the beach, many birds flew off to Snettisham Pits; however, Mark stayed until after dark (around 16:30), by which point the number of people had reduced, and despite the strong wind there were still Oystercatchers on the grot line.

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An Osytercatcher taking off from a beach. Photo by Cathy Ryden.

Fieldwork November 2022

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Friday 25 November

Recces:

Lucy Y. and Mark went out to recce in the morning. Around 07:00 at the Heacham Dam, Snettisham North, Lucy saw no birds, but by 07:15, groups of 30–200 Sanderling began to gather; Lucy also looked at Heacham South where 1,500–2,000 Oystercatchers were already present at 07:00, and stayed until 10:00, settled even with dog walkers going past the flocks on the beach. There were also a few hundred Oystercatchers roosting on the concrete slope of the Heacham Dam. Mark saw 10 Sanderling and six Turnstone at Heacham North, and 10 Oystercatchers at Heacham North North.

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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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The team sitting amongst the grasses at base camp, with the sea beyond, by Sam Franks

Fieldwork August 2022

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Avian Influenza (AI) precautions: With the spread of AI to wild birds (mainly colony nesters), we followed BTO guidelines and also introduced extra safety precautions to minimise risk – see here. There were also some sites we did not have access to for catching.

Friday 12 August

Recces were carried out early on Friday morning:

Norfolk: Cathy found Heacham Beach, north of the Ringed Plover fencing, was gull city with no waders present. Heacham North North at high tide had 33 Turnstone and 26 Ringed Plover.

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