Phylum: Articulate animals (Arthropoda)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Årefjordstranda øst | Østfold, Norway | 6 | 6 | 0 | 2016-09-08 | |
| Åresete | Vestland, Norway | 14 | 13 | 2 | 2017-06-25 | |
| Århuskleiva | Agder, Norway | 4 | 2 | 1 | 2008-04-23 | |
| Årnes | Agder, Norway | 2 | 2 | 0 | 2019-07-04 | |
| Årnestangen | Akershus, Norway | 10 | 8 | 5 | 2014-06-24 | |
| Årnestangen | Akershus, Norway | 6 | 6 | 0 | 2003-06-06 | |
| Årnestangen | Akershus, Norway | 6 | 6 | 5 | 2006-08-04 | |
| Årnestangen | Akershus, Norway | 8 | 8 | 5 | 2008-08-12 | |
| Årnesveien 25 | Troms, Norway | 1 | 1 | 0 | 2007-05-04 | |
| Åros | Akershus, Norway | 47 | 21 | 0 | 2013-09-19 | |
| Årrestad-Håland | Rogaland, Norway | 3 | 3 | 2 | 2009-05-31 | |
| Årsand | Vestland, Norway | 6 | 5 | 6 | 2024-05-18 | |
| Årsneset | Møre og Romsdal, Norway | 1 | 1 | 1 | 2010-01-23 | |
| Årstad | Rogaland, Norway | 8 | 8 | 1 | 2016-04-09 | |
| Årstadtjødne | Rogaland, Norway | 36 | 22 | 0 | 1996-10-11 | |
| Årud | Buskerud, Norway | 6 | 5 | 0 | 2022-04-24 | |
| Årungen | Akershus, Norway | 1 | 1 | 0 | 2011-08-26 | |
| Årungen | Akershus, Norway | 156 | 67 | 0 | 1997-09-12 | |
| Årvik | Rogaland, Norway | 3 | 3 | 0 | 2007-03-28 | |
| Årvikenes | Vestland, Norway | 545 | 142 | 514 | 2024-06-10 | |
| Årvoll | Oslo, Norway | 1 | 1 | 1 | 2014-07-23 | |
| Årøykilen til Askelundkilen | Vestfold, Norway | 32 | 5 | 0 | 1995-09-28 | |
| Årås | Vestland, Norway | 18 | 13 | 0 | 2017-07-14 | |
| Åråshøgda 33 | Vestland, Norway | 48 | 46 | 0 | 2015-08-15 | |
| ås | Akershus, Norway | 1 | 1 | 0 | 2007-04-17 | |
| Åsane | Rogaland, Norway | 45 | 25 | 24 | 2010-07-21 | |
| Åsane | Rogaland, Norway | 44 | 36 | 3 | 2016-03-15 | |
| Åsane | Vestfold, Norway | 3 | 3 | 2 | 2011-07-30 | |
| Åsavatnet | Vestland, Norway | 4 | 4 | 1 | 2011-06-05 | |
| Åse | Vestland, Norway | 4 | 3 | 0 | 2017-09-16 | |
| Åse | Vestland, Norway | 8 | 8 | 9 | 2016-06-04 | |
| Åsedalen | Rogaland, Norway | 5 | 5 | 5 | 2009-07-14 | |
| Åsedalen | Rogaland, Norway | 4172 | 388 | 288 | 2016-08-27 | |
| Åsen | Telemark, Norway | 2 | 2 | 0 | 2015-06-24 | |
| Åsen | Telemark, Norway | 28 | 15 | 0 | 2024-04-03 | |
| Åsen | Vestland, Norway | 1 | 1 | 0 | 2014-08-28 | |
| Åsen (Sandan østre) | Trøndelag, Norway | 8 | 7 | 0 | 2018-08-01 | |
| Åsen, Blylaget | Akershus, Norway | 1 | 1 | 0 | 2007-04-25 | |
| Åsenfjord Gullgruva | Trøndelag, Norway | 1 | 1 | 0 | 2007-05-01 | |
| Åsermarka | Østfold, Norway | 23 | 22 | 9 | 2015-09-05 | |
| Åseveien | Rogaland, Norway | 4 | 4 | 2 | 2012-05-01 | |
| Åsgårdstrand | Vestfold, Norway | 72 | 6 | 0 | 2007-06-07 | |
| Åsheim | Trøndelag, Norway | 1 | 1 | 0 | 2009-04-09 | |
| Åsland | Rogaland, Norway | 10 | 8 | 2 | 2014-05-29 | |
| Åsleiastubben | Akershus, Norway | 7 | 6 | 2 | 2017-04-04 | |
| Åssiden | Buskerud, Norway | 1 | 1 | 0 | 2008-06-20 | |
| Åssiden | Buskerud, Norway | 1 | 1 | 1 | 2017-10-29 | |
| Åstjern | Innlandet, Norway | 3 | 3 | 0 | 2016-06-05 | |
| Åstveit | Vestland, Norway | 55 | 5 | 0 | 1995-09-20 | |
| Åstveit | Vestland, Norway | 3 | 3 | 2 | 2008-09-15 |
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