Larus
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Ole Juulsvei, 7130 Brekstad | Trøndelag, Norway | 3 | 2 | 0 | 2020-01-28 | |
| Ole Tilsethsv.28 | Trøndelag, Norway | 1 | 1 | 0 | 2022-01-29 | |
| Ollebakken 13 | Vestfold, Norway | 2 | 1 | 0 | 2022-01-30 | |
| olles vei 1 | Trøndelag, Norway | 3 | 1 | 0 | 2023-01-28 | |
| Ollestien 9, Nevlunghamn | Vestfold, Norway | 1 | 1 | 0 | 2020-01-26 | |
| Olsvik | Vestland, Norway | 1 | 1 | 0 | 2016-01-25 | |
| Olsvika Ertvågøya | Møre og Romsdal, Norway | 3 | 2 | 0 | 2013-01-27 | |
| Olsvikveien, 211 | Vestland, Norway | 4 | 2 | 0 | 2023-01-29 | |
| Oltervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Omagata 51 | Møre og Romsdal, Norway | 1 | 1 | 0 | 2024-02-04 | |
| Omavegen 44 | Vestland, Norway | 4 | 2 | 0 | 2024-01-28 | |
| One | Vestland, Norway | 1 | 1 | 0 | 2007-04-10 | |
| Onglavikvegen 108 | Vestland, Norway | 5 | 1 | 0 | 2023-01-28 | |
| Onshuusveien 21 | Buskerud, Norway | 1 | 1 | 0 | 2018-01-28 | |
| Opstad | Østfold, Norway | 13 | 1 | 0 | 2024-01-27 | |
| Orresteinen 36 | Vestland, Norway | 1 | 1 | 0 | 2022-01-29 | |
| Orrhaugen | Vestland, Norway | 3 | 2 | 0 | 2023-01-27 | |
| Orsand | Trøndelag, Norway | 3 | 2 | 0 | 2024-01-28 | |
| Orsetfeltet | Møre og Romsdal, Norway | 6 | 1 | 0 | 2022-01-30 | |
| Ortuvann | Vestland, Norway | 1 | 1 | 0 | 2007-10-12 | |
| Osan | Nordland, Norway | 1 | 1 | 0 | 2019-07-13 | |
| Osbakken 3 | Nordland, Norway | 2 | 1 | 0 | 2023-01-31 | |
| Oscar gata 31 (Huitfeldt) | Oslo, Norway | 1 | 1 | 0 | 2013-02-02 | |
| Oscarsgate 63 | Oslo, Norway | 1 | 1 | 0 | 2014-01-26 | |
| Oscarsgt, Frogner | Oslo, Norway | 4 | 1 | 0 | 2018-01-22 | |
| Oscarsgt. 63 | Oslo, Norway | 1 | 1 | 0 | 2022-01-30 | |
| Osebakken | Telemark, Norway | 1 | 1 | 0 | 2015-01-25 | |
| Osebakken | Telemark, Norway | 1 | 1 | 0 | 2014-01-26 | |
| Osen | Nordland, Norway | 2 | 2 | 0 | 2010-05-19 | |
| Oshaug | Nordland, Norway | 19 | 4 | 0 | 2024-04-09 | |
| Oshaugen 25 | Vestland, Norway | 1 | 1 | 0 | 2022-01-30 | |
| Oshaugen 25 | Vestland, Norway | 1 | 1 | 0 | 2022-01-30 | |
| Oslo 6 | Oslo, Norway | 4 | 2 | 0 | 2019-01-25 | |
| Oslo Vest, Vinderen | Oslo, Norway | 1 | 1 | 0 | 2017-01-27 | |
| Osloveien 17, Drøbak sentrum | Akershus, Norway | 3 | 1 | 0 | 2023-01-29 | |
| Osneshavn | Rogaland, Norway | 3 | 2 | 0 | 2020-01-25 | |
| Ospenesvegen 19 | Møre og Romsdal, Norway | 1 | 1 | 0 | 2023-01-24 | |
| Ospenesvegen 8 | Møre og Romsdal, Norway | 3 | 1 | 0 | 2024-01-28 | |
| Ostervika, Randøy | Rogaland, Norway | 1 | 1 | 0 | 2018-01-21 | |
| Osveien 6 | Vestland, Norway | 3 | 1 | 0 | 2024-01-28 | |
| Osvika | Vestland, Norway | 1 | 1 | 0 | 2010-04-10 | |
| Osøyrane 7, 6155 Ørsta | Møre og Romsdal, Norway | 1 | 1 | 0 | 2023-01-30 | |
| Oterlia 27 | Agder, Norway | 1 | 1 | 0 | 2019-01-27 | |
| Oternesveien 5 | Møre og Romsdal, Norway | 1 | 1 | 0 | 2019-01-27 | |
| Othilienborgvegen 52 | Trøndelag, Norway | 2 | 1 | 0 | 2024-01-29 | |
| Otto Engers Gate 7 | Vestfold, Norway | 2 | 1 | 0 | 2022-01-30 | |
| Otto Olsens gate 48 | Rogaland, Norway | 1 | 1 | 0 | 2021-01-30 | |
| P. B. Kristviks Veg 6 | Møre og Romsdal, Norway | 1 | 1 | 0 | 2023-01-30 | |
| Paradis, G5, Br. 11 | Rogaland, Norway | 5 | 2 | 0 | 2023-02-11 | |
| Parkveien 105 | Rogaland, Norway | 1 | 1 | 0 | 2018-01-18 |