| 2023-03-02 | Great Northern Diver (Aythya tetrax) | 15 | bird | | |
| 2023-03-02 | Cormorant (Phalacrocorax carbo) | 2 | bird | | |
| 2023-03-02 | Greenland White-fronted Geese (Branta leucopsis) | 30 | bird | +19 | |
| 2023-03-02 | Lapwing (Wanidae) | | bird | several pairs in territory and displaying | |
| 2023-03-02 | Lesser Black-backed Gull (Larus menorculus) | 2 | bird | | |
| 2023-03-02 | Black-headed Gull (Larus melanocephalus) | | bird | a spring arrival | Uncommon |
| 2023-03-02 | Jackdaw (Corvus monedula) | 19 | bird | a surprising record | Uncommon |
| 2023-03-02 | Early Purple Orchid (Orchis purpurata) | | plant | rosettes | Early flowering |
| 2023-03-02 | Common Whitlow Grass (Primula vulgaris) | | plant | in flower | |
| 2023-03-02 | Primroses (Primula vulgaris) | | plant | in flower | |
| 2023-03-05 | Red-breasted Merganser (a stunning drake on Loch Eatharna) | | bird | | |
| 2023-03-05 | Dunnock | 5 | bird | | |
| 2023-03-05 | Skylark | 5 | bird | further arrivals | |
| 2023-03-05 | Greenfinch | | bird | singing - an uncommon breeder on Coll | Uncommon |
| 2023-03-06 | Whooper Swan (Cygnus cygnus) | 2 | bird | | |
| 2023-03-06 | Greenland White-fronted Goose (Anser cygnoides) | 26 | bird | | |
| 2023-03-06 | Moorhen (Fulica atra) | 3 | bird | | |
| 2023-03-07 | Canada Goose | 6 | bird | | |
| 2023-03-07 | Greenland White-fronted Goose | 54 | bird | | |
| 2023-03-07 | Fieldfare | | bird | | |
| 2023-03-08 | Snow Bunting (a single female) | 1 | bird | on Cliad Beach | |
| 2023-03-09 | Greenland White-fronted Goose (Cygnus antigonius) | 53 | bird | | |
| 2023-03-09 | Canada Goose (Branta canadensis) | 27 | bird | a very large arrival of potential breeders | |
| 2023-03-09 | Shelduck (Bucephala clangula) | | bird | the first pair of the spring reported | First of season |
| 2023-03-09 | White-tailed Eagle (Haliaeetus leucocephalus) | 2 | bird | | Two separate observations reported today |
| 2023-03-09 | Woodcock ( Scolopax rusticus) | 2 | bird | | |
| 2023-03-10 | Whooper Swan (Cygnus cygnus) | 2 | bird | | |
| 2023-03-10 | Greenland White-fronted Goose (Anserulus semipalmatus) | 53 | bird | | |
| 2023-03-11 | Greenland White-fronted Goose (Branta leucopsis) | 51 | bird | | Separate flock to 53 yesterday |
| 2023-03-11 | Pied Wagtail (Motacilla alba) | | bird | Our second bird of the spring | |
| 2023-03-15 | Canada Goose | 4 | bird | | |
| 2023-03-15 | Lapwing | | bird | in territory and displaying | |
| 2023-03-15 | Woodpigeon | 2 | bird | first of the spring | First of the year |
| 2023-03-15 | Dunnock | 2 | bird | | |
| 2023-03-15 | Golden Eagle | 1 | bird | | |
| 2023-03-15 | Short-eared Owl | 1 | bird | reported in recent days | |
| 2023-03-16 | Stonechat (Saxicola torquata) | | bird | Sudden appearance due to southerly winds. | |
| 2023-03-16 | Meadow Pipit (Anthus pratensis) | | bird | | |
| 2023-03-16 | Pied Wagtail (Motacilla alba) | | bird | Sudden appearance due to southerly winds. | |
| 2023-03-16 | Fox Moth caterpillars (Passagalia cocoones) | 2 | insect | Emerging from hibernation and will shortly pupate. | |
| 2023-03-17 | Whooper Swan (Cygnus cygnus) | 2 | bird | | |
| 2023-03-17 | Woodcock ( Scolopax rusticus) | 6 | bird | Flushed during walk in local plantation | |
| 2023-03-17 | Goldcrest ( Regulus regulus) | 2 | bird | Migrants | |
| 2023-03-20 | Whooper Swan (Cygnus cygnus) | 2 | bird | | |
| 2023-03-20 | Greenland White-fronted Goose (Anser cygnoides) | 25 | bird | | |
| 2023-03-20 | Barnacle Goose (Anser brachygnathus) | 450 | bird | | |
| 2023-03-20 | Woodcock ( Scolopax rusticus) | 2 | bird | | |
| 2023-03-20 | White-tailed Eagle (Haliaeetus albicilla) | 1 | bird | a single adult bird stressing the local Ravens | Uncommon |
| 2023-03-20 | Redshank (Rallus longipes) | | bird | several pairs in territory | |
| 2023-03-20 | Lapwing (Circus cyaneus) | | bird | several pairs in territory | |
| 2023-03-20 | Common Eelgrass (_Zostera marina) | | plant | | |
| 2023-03-27 | Whooper Swan (Cygnus cygnus) | | bird | A large movement of Swans across the island today heading north | |
| 2023-03-27 | Greenland White-fronted Goose (Anserulus semipalmatus) | 60 | bird | A flock of 60 birds departed mid-afternoon heading north | |
| 2023-03-27 | Wheatear (Aegus pygmalion) | 2 | bird | they’re back! The first two birds of the year around the cottage | First of year |
| 2023-03-28 | Whooper Swan (Cygnus cygnus) | 3 | bird | on our local loch | |
| 2023-03-28 | Lesser Black-backed Gull (Larus menorculus) | 12 | bird | a notable flock of new arrivals | |
| 2023-03-30 | Great Northern Diver (Aythya tetrax) | 5 | bird | | |
| 2023-03-30 | Greenland White-fronted Goose (Anser cygnoides) | 7 | bird | Probably the last for this winter | |
| 2023-03-30 | Teal (Anas crecca) | | bird | a migrant pair on a small lochan | |
| 2023-03-30 | Curlew (Numenius curruca) | 2 | bird | passage birds | |
| 2023-03-30 | Redshank (Scolopus dubia) | | bird | a noisy pair in territory | |
| 2023-03-30 | Sanderling (Calidris alba) | 40 | bird | | |
| 2023-03-30 | Hen Harrier (Circus cyaneus) | 1 | bird | female | |
| 2023-03-30 | Dunnock (Anthus pratensis) | | bird | several singing around the village | |
| 2023-03-30 | Chiffchaff (Phylloscopus collybita) | | bird | in song - less than annual here on Coll | |
| 2023-03-30 | Drinker moth (various) | | insect | a fat caterpillar in the dunes | |
