| 2021-09-01 | Angle Shades Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Square-spot Rustic Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Dark Marbled Carpet Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Small Fan-footed Wave Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Autumnal Rustic Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Mouse Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Small Wainscot Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Rosy Rustic Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Ear Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Large Yellow Underwing Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Antler | | mammal | Moth Trap sighting | |
| 2021-09-01 | White-line Dart Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Heath Rustic Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Oblique Carpet Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Dark Arches Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Northern Deep-brown Dart Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | Grey Chi Moth | | moth | Moth Trap sighting | |
| 2021-09-01 | _Udea lutealis_ | | moth | Moth Trap sighting | |
| 2021-09-01 | _Eana penziana_ | | moth | Moth Trap sighting | |
| 2021-09-02 | Shrike (Dor Beetles impaled on barbed wire) | | other | Beetles impaled on barbed wire, no Shrike sighting. | |
| 2021-09-02 | Sparrowhawk | | bird | Recently fledged family group. | |
| 2021-09-02 | Peregrine | 2 | bird | | |
| 2021-09-02 | Hen Harrier (ring-tailed) | 1 | bird | Ring-tailed. | |
| 2021-09-02 | Snipe | 4 | bird | | |
| 2021-09-03 | Hen Harrier (ring-tailed) | 2 | bird | | Ring-tailed |
| 2021-09-03 | Sedge Warbler | | bird | | |
| 2021-09-03 | Whimbrel | 1 | bird | | |
| 2021-09-03 | Fulmar | | bird | | |
| 2021-09-03 | Sanderling | 4 | bird | | |
| 2021-09-03 | Eider | 13 | bird | | |
| 2021-09-03 | Great Northern Diver | | bird | | |
| 2021-09-03 | Red-throated Diver | 6 | bird | | |
| 2021-09-03 | Snow Goose | 6 | bird | | |
| 2021-09-03 | Frog Orchid | | plant | | |
| 2021-09-03 | Field Gentian | | plant | | |
| 2021-09-05 | Antler Moth | | moth | Moth Trap sighting | |
| 2021-09-05 | Square-spot Rustic | | moth | Moth Trap sighting | |
| 2021-09-05 | Anomalous Ear Moth | | moth | Moth Trap sighting - Anomalous specimen | |
| 2021-09-05 | Northern Deep-brown Dart | | moth | Moth Trap sighting | |
| 2021-09-05 | Autumnal Rustic | | moth | Moth Trap sighting | |
| 2021-09-05 | Grass of Parnassus | | plant | In flower | |
| 2021-09-05 | Pale Butterwort | | plant | In flower | |
| 2021-09-06 | Common Hawker | | insect | | |
| 2021-09-06 | Pomarine Skua (Stercorarius pomarinus) | | bird | | |
| 2021-09-07 | Peregrine (Falco peregrinus) | 1 | bird | | Uncommon |
| 2021-09-07 | Goldcrest | | bird | | |
| 2021-09-07 | Dunlin | 2 | bird | | |
| 2021-09-07 | Curlew | 3 | bird | | |
| 2021-09-07 | Irish Ladies-tresses | 1 | fungi | in flower | |
| 2021-09-07 | Red Admiral | 2 | insect | | |
| 2021-09-08 | Small Wainscot Moth | | moth | Moth Trap | |
| 2021-09-08 | Autumnal Rustic Moth | | moth | Moth Trap | |
| 2021-09-08 | Square-spot Rustic Moth | | moth | Moth Trap | |
| 2021-09-08 | Rosy Rustic Moth | | moth | Moth Trap | |
| 2021-09-08 | Antler Moth | | moth | Moth Trap | |
| 2021-09-08 | Ear Moth | | moth | Moth Trap | |
| 2021-09-08 | Black Rustic Moth | | moth | Moth Trap | |
| 2021-09-08 | Eudonia angustea | | insect | Moth Trap | |
| 2021-09-08 | White-tailed Eagle | 2 | bird | | |
| 2021-09-10 | Peregrine | | bird | | |
| 2021-09-10 | Sooty Shearwater (from ferry) | | bird | | |
| 2021-09-10 | Minke Whale (from ferry) | | mammal | | |
| 2021-09-10 | Common Dolphins | 25 | mammal | | |
| 2021-09-11 | Golden Plover (x3) | 3 | bird | | |
| 2021-09-12 | Golden Plover (Calidris auriceps) | 13 | bird | | |
| 2021-09-12 | Greenland Wheatear (Sterpaea paradisaea) | | bird | a small influx of passage birds | |
| 2021-09-12 | Curlew (Numenius americanus) | 1 | bird | | |
| 2021-09-13 | Square-spot Rustic (Lophotelia quadricincta) | | moth | Moth Trap sighting | |
| 2021-09-13 | Small Wainscot (Lophotelia strigilata) | | moth | Moth Trap sighting | |
| 2021-09-13 | Antler Moth (Dialepteria antleri) | | moth | Moth Trap sighting | |
| 2021-09-13 | Mouse Moth (Abrostola lucens) | | moth | Moth Trap sighting | |
| 2021-09-13 | Ear sp (Ascalaphus strumalis) | | moth | Moth Trap sighting | |
| 2021-09-13 | Grey Chi (Chrysalis pollicipes) | | moth | Moth Trap sighting | |
| 2021-09-13 | Angle Shades (Ascalaphus rugifrons) | | moth | Moth Trap sighting | |
| 2021-09-13 | Rosy Rustic (Lophotelia rosea) | | moth | Moth Trap sighting | |
| 2021-09-13 | Red-line Quaker (Apodemia penna) | | moth | Moth Trap sighting | |
| 2021-09-13 | Large Yellow Underwing (Ancales yersa) | | moth | Moth Trap sighting | |
| 2021-09-13 | Necrodes littoralis (Sexton Beetle) | | invertebrate | Moth Trap sighting | |
| 2021-09-14 | White-tailed Eagle (Aquila chrysaetos) | 2 | bird | | |
| 2021-09-14 | Peregrine | | bird | | |
| 2021-09-15 | Peregrine (Falco peregrinus) | | bird | | |
| 2021-09-16 | Sooty Shearwater (from ferry) | | bird | | |
| 2021-09-19 | Red-throated Diver | | bird | | |
| 2021-09-19 | Great Skua | | bird | | |
| 2021-09-19 | Wigeon | 2 | bird | | |
| 2021-09-19 | Pink-footed Geese | 13 | bird | | |
| 2021-09-19 | Red-throated Divers | 15 | bird | | |
| 2021-09-19 | Common Guillemot | 12 | bird | | |
| 2021-09-19 | Sanderling | 40 | bird | | |
| 2021-09-19 | Ringed Plover | 20 | bird | | |
| 2021-09-19 | White Wagtail | | bird | | |
| 2021-09-19 | Red-breasted Merganser | | bird | | |
| 2021-09-19 | Kestrel | 2 | bird | | |
| 2021-09-19 | Sparrowhawk | | bird | | |
| 2021-09-19 | Twite | | bird | | |
| 2021-09-20 | Merlin (female) | | bird | | |
| 2021-09-20 | Red-throated Diver (x3) | 3 | bird | | |
| 2021-09-20 | Dunlin (x6) | 6 | bird | | |
| 2021-09-20 | Sanderling (x4) | 4 | bird | | |
| 2021-09-20 | Kittiwake | | bird | | |
| 2021-09-20 | Pale-bellied Brent Goose (x1) | 1 | bird | | Uncommon |
| 2021-09-20 | Curlew (x10) | 10 | bird | | |
| 2021-09-20 | Golden Plover (x1) | 1 | bird | | Uncommon |
| 2021-09-20 | Wood Pigeon (x2) | 2 | bird | | |
| 2021-09-20 | Manx Shearwater (x6) | 6 | bird | | |
| 2021-09-20 | Sooty Shearwater | | bird | | |
| 2021-09-20 | Great Skua (x2) | 2 | bird | | |
| 2021-09-21 | Small Wainscot | | moth | Moth Trap | |
| 2021-09-21 | Large Wainscot | | moth | Moth Trap | |
| 2021-09-21 | Large Yellow Underwing | | moth | Moth Trap | |
| 2021-09-21 | Lunar Underwing | | moth | Moth Trap | |
| 2021-09-21 | Garden Rose Tortrix | | moth | Moth Trap | |
| 2021-09-21 | Brindled Ochre | | moth | Moth Trap | |
| 2021-09-21 | Sanderling | 13 | bird | | |
| 2021-09-21 | Ringed Plover | 25 | bird | | |
| 2021-09-21 | Wigeon | 4 | bird | | |
| 2021-09-21 | Great Northern Diver | | bird | | |
| 2021-09-21 | Red-throated Diver | 6 | bird | | |
| 2021-09-22 | Semi-palpated Sandpiper (Calidris purringtoni) | | bird | | |
| 2021-09-22 | Pink-footed Geese | 7 | bird | | |
| 2021-09-23 | Turnstone | 45 | bird | | |
| 2021-09-23 | Sanderling | 120 | bird | | |
| 2021-09-23 | Dunlin | 10 | bird | | |
| 2021-09-23 | Ringed Plover | 80 | bird | | |
| 2021-09-23 | Redshank | | bird | | |
| 2021-09-23 | Red-breasted Merganser | 8 | bird | | |
| 2021-09-23 | Great Northern Diver | 2 | bird | | |
| 2021-09-23 | Eider | | bird | | |
| 2021-09-23 | Manx Shearwater | | bird | | |
| 2021-09-23 | Wigeon | 1 | bird | | |
| 2021-09-23 | Whimbrel | 1 | bird | | |
| 2021-09-23 | Curlew | 4 | bird | | |
| 2021-09-23 | Red-throated Diver | 4 | bird | | |
| 2021-09-23 | Risso’s Dolphin | | other | male dead on beach | Unusual |
| 2021-09-24 | Great Skua | | bird | | |
| 2021-09-24 | Hen Harrier (male) | | bird | | |
| 2021-09-24 | Merlin (x2) | 2 | bird | | |
| 2021-09-24 | Great Northern Diver | | bird | | |
| 2021-09-24 | Kittiwake | | bird | | |
| 2021-09-24 | Ringed Plover (x43) | 43 | bird | | |
| 2021-09-24 | Red-breasted Merganser (x6) | 6 | bird | | |
| 2021-09-24 | Twite | | bird | | |
| 2021-09-24 | Red-throated Diver | | bird | | |
| 2021-09-24 | White-fronted Goose (x 1 south) | 1 | bird | Southward migration | |
| 2021-09-24 | Pale-bellied Brent Goose (x1) | 1 | bird | | Uncommon |
| 2021-09-24 | Snowgoose (x6) | 6 | bird | | |
| 2021-09-24 | Swallow (x2) | 2 | bird | | |
| 2021-09-24 | Sand Martin (x1) | 1 | bird | | |
| 2021-09-24 | Black-tailed Godwit (x40 south) | 40 | bird | Southward migration | |
| 2021-09-24 | Goosander (x3 reported) | 3 | bird | | |
| 2021-09-24 | Otter (x2) | 2 | mammal | | |
| 2021-09-24 | Red Admiral | | insect | | |