The data records bird species and number in different green spaces within Sheffield City Region during June and July 2018. Activity of individual birds is also noted. Ten green spaces (parks) were surveyed on three occasions, with a researcher walking along six pre-designated line transects in each location. Birds were recorded by their common names and British Trust for Ornithology (BTO) code. Date and time were recorded for each observation. The data was collected as part of the NERC IWUN Project (Improving well-being through urban nature). Full details about this dataset can be found at https://doi.org/10.5285/aff674ee-cf95-4378-b002-f41c0a5a6a4e
