1. Wintering and passage waders
A number of waders pass through the UK on migration to/from
breeding grounds in the Arctic or Scandinavia, and more southerly
wintering areas. The migration of these species is irregular and
often varies in volume considerably between years. Sites used are
not always predictable. For the following migratory species it has
not been possible to locate internationally significant
concentrations that occur on a predictable basis: Spotted Redshank
Tringa erythropus, Green Sandpiper Tringa
ochropus, Little Stint Calidris minuta, Curlew
Sandpiper C. ferruginea, and – the least predictable –
Grey Phalarope Phalaropus fulicarius. Jack Snipe
Lymnocryptes minimus winters in the UK and the species is
arguably the most poorly known of all regularly occurring British
birds in terms of knowledge of population size (10,000–100,000
individuals – Cayford & Waters 1996), and trends (unknown).
There are no known concentrations. An EU action plan is under
development for the species since it is an Annex II species with an
unfavourable conservation status. A major element of this plan will
to be to improve knowledge and monitoring of the species.