Dataset for study Long-term changes in urban bird populations: correspondence of the trends between urban and rural areas

Dataset used for a study "Long-term changes in urban bird populations: correspondence of the trends between urban and rural areas" Data structure: Type = type of environment (R - rural, U - urban)<br> POID = unique identifier of each census point across all transects<br> Transect = unique identifier of a transect (each contains 20 census points)<br> Point = unique identifier of a point within one transect<br> Year = year of the count<br> Species = scientific name of bird species<br> Count = number of birds counted Each species has its own datafile.