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Table 3 Number of articles found in each search step

From: Effects of artificial light on bird movement and distribution: a systematic map

Source type Captured articles Eligible articles Unique articles
Web of Science (Core Collection) 11,331 (1,028)* 136 (14) 136 (14)
Web of Science Zoological Record 6,353 (417)* 205 (9) 199 (2)
Google Scholar 3,791* 22 19
Proquest Dissertations at Theses Global 1,187 (58) 8 (1) 8 (1)
Specialized Databases 4,734 (132) 100 (1) 60 (1)
Organizational Websites   17 10
Found Incidentally   19 19
  Total: 29,031   Total: 469
  1. *These represent the number of articles captured after pre-screening with Microsoft Excel Macros (Additional files 2 and 3) and removal of duplicates (Additional file 12: Figure S1)
  2. This is the number of articles captured from the Web of Science Zoological Record before removing articles also found in the Web of Science Core Collection (2555 such articles were removed in the original search, 149 in the updated search). After removing these duplicates, 26,208 articles were screened (21,342 in Rayyan, 4866 on websites or in downloaded documents).