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Tender: Winter Food Availability Assessment for Overwintering Eiders – Teesmouth, Cleveland Coast SPA & Northumberland Sites

Released 11 months ago

Closed05 Nov 2025

Est. valueEstimate£15K to £20K

LocationNorth East

AgencyNatural England

SourceFind a Tender

CategoryResearch & Development

Submissions closedClosed Wed, 5 Nov 2025

About

A research commission is seeking a supplier for an assessment of food availability for overwintering eiders, focused on mussel and alternate prey resources at five regional sites used by eiders. The study responds to substantial population declines (c60% across Great Britain over 25 years and c75% in England over 30+ years) and the critical loss of mussel resources in Northumberland since 2012, noting that mussel beds persist in the Teesmouth and Cleveland Coast SPA where wintering eiders occur. The work will determine mussel and alternative food availability using intertidal rocky reef transect surveys carried out at the period of lowest possible tides in November or, as contingency, December 2025 to reflect winter foraging conditions. Interested suppliers should provide proposed methodology, team qualifications and experience, a project timetable with a Gantt, a risk log with mitigation actions, and evidence of team capability to operate safely in the required environment and conditions.

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2 new research and development tenders

Wintering Bird Surveys near Humber Estuary SPA — Jan–Mar 2027 (40 Sites)Research & Development · Closes 23 Nov 2026

Fine-scale Mapping of Designated Bird Species Habitat Use – Teesmouth & Cleveland CoastEnergy & Environment · Closes 13 Nov 2026

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