City,Country,area ,human popn density,human popn size,Duration of checklist,Methodology,Source /citation,Taxonomic authority,other Orebro,Sweden,1380.11 km2,2172/km2,"150,949 (in 2018)",1998-1999,"Birds were surveyed using point-counts (Swedish Environmental Protection Agency, 1978) in 20 sampling points randomly distributed along a route covering each of the four strata during spring (i.e. April to June) in 1998 and 1999. To prevent overlapping observations of bird individuals the distance between survey points was set to at least 200 m. All individuals of bird species seen or heard were recorded during 5 min at every point. Over-flying birds obviously not using the habitat were ignored. Every point was visited four times each year during clear days with little or no wind. In April, two surveys were made in the mornings whereas in May and June, in order to cover the spectrum of species activity patterns, one count was carried out early in the morning and one late in the evening.","Sandström UG, Angelstam P, Mikusinski G. 2006 Ecological diversity of birds in relation to the structure of urban green space. Landscape Urban Plan 77, 39-53.",,