This publication, from Wetlands
International, sets the global standard in presenting estimates of
the numbers and trends of waterbird populations throughout the
world. Developed in support of the
Ramsar Convention, and used
for the
African-Eurasian Migratory
Waterbird Agreement (AEWA) under the Bonn Convention, it lists
population estimates for biogeographical populations of waterbirds,
along with 1% thresholds and population trend information. The
compilation draws on many sources of data, including the
International Waterbird Census (IWC), which itself draws on the
Wetland Bird Survey (WeBS) for UK data.
The estimates and thresholds
presented have been adopted for statutory use by JNCC and
the Country Agencies. For ease of interpretation we provide a
list of international populations and 1% thresholds for Great
Britain and Ireland.
JNCC supports the work of
Wetlands International and supported
the publication of the fourth edition of Waterbird Population
Estimates.
Population estimates are collated
periodically in a single source document by the Avian Population
Estimates Panel, which is a group of experts from key organisations
that are involved in producing population estimates. The APEP list
is used for statutory purposes and national 1% threshold values are
derived from it according to rules agreed by the Statutory
Conservation Agencies.
APEP06 list (full published
paper): published in
British Birds 99 in January
2006, this is the most recent collation of national population
estimates. Link to
British Birds report