NDFF Point-transect counts for birds

The Point Transact Count Project (PTT) is the longest-running monitoring project of Sovon Dutch Centre for Field Ornithology. It has the following aim: reporting on numbers and occurrence of more or less common winter birds, in addition to other winter bird projects (such as water bird counting projects). All species are counted. This project contributes invaluable data on about 80 species. It looks at birds that migrate for the winter from Northern and Eastern Europe (Turdus pilaris, Fringilla montifringilla) and resident birds (Picus Viridis, Passer domesticus). Dataset available via https://www.ndff.nl/english / [e-mail] 3,006,511 records (March 2018) https://www.ndff.nl/overdendff/validatie/protocollen/14-204-punt-transect-telling/