Phylum: Articulate animals (Arthropoda)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Arendalsvegen | Agder, Norway | 251 | 77 | 137 | 2008-09-07 | |
| Arkavatnet | Rogaland, Norway | 168 | 94 | 0 | 1994-09-12 | |
| Arna | Vestland, Norway | 1 | 1 | 0 | 2007-04-14 | |
| Arnesbukta | Akershus, Norway | 1 | 1 | 1 | 2007-04-17 | |
| Aronnes | Finnmark, Norway | 1 | 1 | 0 | 2016-05-06 | |
| Aronnes | Finnmark, Norway | 1 | 1 | 0 | 2013-04-26 | |
| Aronnesskogen | Finnmark, Norway | 3 | 3 | 0 | 2023-05-12 | |
| Arstaddalen | Nordland, Norway | 3 | 3 | 3 | 2008-07-30 | |
| Arsvågen ferjekai | Rogaland, Norway | 1 | 1 | 0 | 2011-04-18 | |
| Asakmarka | Akershus, Norway | 26 | 6 | 0 | 2012-04-18 | |
| Asaldalen | Rogaland, Norway | 4 | 2 | 1 | 2023-10-02 | |
| Asdal | Telemark, Norway | 1 | 1 | 2 | 2019-05-01 | |
| Askehavn | Vestland, Norway | 3 | 3 | 1 | 2020-06-20 | |
| Asker | Akershus, Norway | 2 | 2 | 2 | 2018-06-26 | |
| Asker | Akershus, Norway | 11 | 3 | 0 | 2020-04-03 | |
| Asker, Bleiker | Akershus, Norway | 1 | 1 | 0 | 2014-09-05 | |
| Askerelva | Akershus, Norway | 12 | 12 | 0 | 1993-09-21 | |
| Askilt | Telemark, Norway | 2 | 2 | 2 | 2007-06-07 | |
| Askim | Østfold, Norway | 158 | 88 | 102 | 2020-03-31 | |
| Askrova | Vestland, Norway | 16 | 3 | 0 | 1994-01-13 | |
| Askvatnet | Vestland, Norway | 1 | 1 | 1 | 2011-07-05 | |
| askvoll sentrum | Vestland, Norway | 1 | 1 | 0 | 2007-04-15 | |
| Asmalø | Østfold, Norway | 19 | 3 | 0 | 1993-11-23 | |
| Asmaløy | Østfold, Norway | 175 | 5 | 0 | 1996-09-25 | |
| Asnes | Vestfold, Norway | 5 | 3 | 0 | 2016-03-20 | |
| Astridkjølen | Innlandet, Norway | 1 | 1 | 1 | 2011-07-13 | |
| Atlegdmyr | Vestfold, Norway | 2 | 2 | 1 | 2012-07-09 | |
| Atna | Innlandet, Norway | 1 | 1 | 0 | 2007-05-02 | |
| Atnadalen | Innlandet, Norway | 1 | 1 | 1 | 2007-06-03 | |
| Audamotland | Rogaland, Norway | 17 | 17 | 0 | 2012-08-26 | |
| Audemotland | Rogaland, Norway | 17 | 16 | 8 | 2013-09-26 | |
| Auenhaugen, Golsfjellet | Buskerud, Norway | 1 | 1 | 0 | 2010-04-11 | |
| Auglend | Rogaland, Norway | 5 | 5 | 2 | 2012-05-23 | |
| Auklandsvatnet | Rogaland, Norway | 8 | 8 | 0 | 1989-10-30 | |
| Aunvågen | Trøndelag, Norway | 17 | 14 | 1 | 2018-07-05 | |
| Aurdal | Rogaland, Norway | 20 | 20 | 27 | 2006-09-03 | |
| Aurdalsåsen | Innlandet, Norway | 5 | 5 | 5 | 2012-09-01 | |
| Aure | Møre og Romsdal, Norway | 2 | 2 | 0 | 2002-02-14 | |
| Aurenakken | Møre og Romsdal, Norway | 1 | 1 | 0 | 2001-05-01 | |
| Aureosen | Møre og Romsdal, Norway | 4 | 3 | 0 | 1993-09-24 | |
| Aurihopsvatna | Vestland, Norway | 2 | 2 | 2 | 2008-07-05 | |
| Aurlandsvangen | Vestland, Norway | 12 | 12 | 0 | 2015-07-04 | |
| Aurmoen, Gardermoen | Akershus, Norway | 6 | 6 | 14 | 2014-07-26 | |
| Aurskog | Akershus, Norway | 2 | 1 | 0 | 2008-05-24 | |
| Ausa,hisøy | Agder, Norway | 1 | 1 | 0 | 2019-02-24 | |
| Austad , Bikkjestykket. | Buskerud, Norway | 1 | 1 | 1 | 2015-08-02 | |
| Austadtjern | Buskerud, Norway | 29 | 29 | 0 | 2013-09-25 | |
| austbø | Telemark, Norway | 1 | 1 | 0 | 2007-04-22 | |
| Austdalen | Vestland, Norway | 1 | 1 | 1 | 2013-07-22 | |
| Austefjord Barnehage | Møre og Romsdal, Norway | 1 | 1 | 0 | 2008-03-14 | |
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