Addendum to main results of the International Swan Census 2020 in Ireland, which were originally published in Irish Birds in 2021.

Results of the International Swan Census 2020 in the Republic of Ireland and Northern Ireland. The census is carried out every five years to determine the population size, distribution and…

Background and methodology for calculation of Countryside Bird Survey (CBS) species trends, 1998-2021.

The 2022 edition of ‘CBS News’ – the annual newsletter of the Countryside Bird Survey.

Details of how species trends are calculated, based on data from the Countryside Bird Survey (CBS)

An update of the status of wintering Greylag and Pink-footed Geese in Ireland.