| 2024-06-02 | Sanderling (Calidris alba) | 5 | bird | breeding plumage birds | |
| 2024-06-02 | Dunlin (Calidris alpina) | 2 | bird | breeding plumage birds | |
| 2024-06-02 | Early Marsh Orchid (Dactylorhiza purpurea) | | plant | in a new location for us | |
| 2024-06-02 | Pyramidal Orchid (Neottoglossum pyramidalis) | | plant | first flowering spike of the year | First of year |
| 2024-06-03 | Arctic Skua (Scolopha islandica) | 2 | bird | | |
| 2024-06-03 | Great Skua (Stercorarius skutilensis) | 1 | bird | Scarce this year but at least this individual is regular now | |
| 2024-06-03 | Hen Harrier (Circus cyaneus) | 2 | bird | separate males | |
| 2024-06-03 | Silver Hook moth (Antheraea nubilosa) | | moth | only the second record for Coll | Uncommon |
| 2024-06-04 | Corncrake (a quiet morning but the action picked up in the afternoon when a bird crossed the road in front of the van!) | | bird | | |
| 2024-06-04 | Early orchid | | plant | Plenty of Early and hybrid Early x Northern Marsh orchids in the machair dune slacks | |
| 2024-06-04 | Early x Northern Marsh orchid | | plant | Plenty of Early and hybrid Early x Northern Marsh orchids in the machair dune slacks | |
| 2024-06-04 | Heath Violet (a new location for Coll in machair dune slacks - only the second we have found here) | | plant | | Uncommon |
| 2024-06-04 | Diplolepis spinosissimae (a wasp gall on Burnet Rose - our first on Coll) | | invertebrate | a wasp gall on Burnet Rose - our first on Coll | First of year |
| 2024-06-06 | Great Grey Shrike (Circus cyaneus) | | bird | Reported late today - no sign in morning | |
| 2024-06-08 | Sanderling (Calidris alba) | 100 | bird | mostly summer-plumaged birds | |
| 2024-06-08 | Dunlin (Calidris alpina) | 10 | bird | | |
| 2024-06-08 | Long-finned Pilot Whale (Globicephala melas) | | mammal | dead on beach | |
| 2024-06-08 | Oyster Thief (Tarengium palmaeformis) | | invertebrate | Mass stranding of seaweeds | |
| 2024-06-09 | Common Dolphin | 5 | mammal | Between Coll and Lunga | |
| 2024-06-09 | Spiny Mason Wasp (_Odynerus spinipes_) | | insect | On Lunga | |
| 2024-06-10 | Hen Harrier (Buteo buteo) | 3 | bird | Three separate males observed. | |
| 2024-06-10 | White-tailed Eagle (Haliaeetus albicilla) | 1 | bird | Adult being escorted by Ravens. | |
| 2024-06-10 | Corncrake (Crex crebrosa) | 3 | bird | Three separate individuals seen. | |
| 2024-06-10 | Brown Hare (Lepus europaeus) | 7 | mammal | Chilling together in the machair. | |
| 2024-06-10 | _Anania fuscalis_ (Crambid moth) | | moth | A day-flying Crambid moth in the machair. | |
| 2024-06-10 | Pyramidal Orchid (Orchis pyramidalis) | | plant | | |
| 2024-06-10 | Sea Bindweed (Calystegia sepium) | | plant | | |
| 2024-06-11 | Shelduck (a pair) | 1 | bird | on the big sea with 11 tiny ducklings! | |
| 2024-06-11 | Four-spotted Chaser dragonfly | 1 | insect | | |
| 2024-06-11 | Black Darter dragonfly (female) | 1 | insect | | |
| 2024-06-11 | Blue-tailed Damselfly | 1 | amphibian | | |
| 2024-06-11 | Common Blue Damselfly | 1 | amphibian | | |
| 2024-06-11 | Large Red Damselfly | 1 | amphibian | | |
| 2024-06-11 | Black Clock Beetle (a black ground beetle with red legs) | 1 | insect | a black ground beetle with red legs | |
| 2024-06-11 | Heath Fragrant Orchid | 1 | plant | | |
| 2024-06-11 | Frog Orchid | 1 | plant | | |
| 2024-06-11 | Square-stalked St John’s-wort | 1 | plant | | |
| 2024-06-12 | Drinker | | insect | | |
| 2024-06-12 | Elephant Hawkmoth | | moth | | |
| 2024-06-12 | Poplar Hawkmoth | | moth | | |
| 2024-06-12 | Clouded-bordered Brindle | | invertebrate | | |
| 2024-06-12 | Heart and Dart | | moth | | |
| 2024-06-12 | Silver Ground Carpet | | insect | | |
| 2024-06-12 | Dusky Brocade | | moth | | |
| 2024-06-12 | Knotgrass | | plant | | |
| 2024-06-12 | Black-throated Diver | 2 | bird | a great summer record | Uncommon |
| 2024-06-12 | Curlew | | bird | a pair including one singing bird | |
| 2024-06-12 | Sparrowhawk | | bird | | |
| 2024-06-12 | Black Guillemot | | bird | | |
| 2024-06-12 | Large Heath | | plant | | |
| 2024-06-12 | Small Heath | | plant | | |
| 2024-06-12 | Marsh Fritillaries | | plant | appear to be having a good year on Coll | Reported |
| 2024-06-13 | Snow Goose (Branta leucopsis) | 5 | bird | Our feral flock in the usual area. No evidence of breeding this year. | |
| 2024-06-13 | Hen Harrier (Circus cyaneus) | 2 | bird | Two separate males. | |
| 2024-06-13 | Dunlin (Calidris alpina) | 5 | bird | Race birds (_arctica_) | |
| 2024-06-13 | Great Northern Diver (Aythyaitta garrulus) | 1 | bird | | |
| 2024-06-13 | Arctic Skua (Stercorarius arctica) | 1 | bird | | |
| 2024-06-13 | Great Skua (Stercorarius paganus) | 1 | bird | | |
| 2024-06-13 | Swift (Apus apus) | 1 | bird | A late over-shooting migrant bird - less than annual on Coll. | Late |
| 2024-06-14 | Great Skua (Stercorarius skuan) | | bird | | |
| 2024-06-14 | Black-headed Gull (Larus melodus) | | bird | | |
| 2024-06-15 | Great Northern Diver (Aythya larx) | 4 | bird | | |
| 2024-06-15 | Sanderling (Calidris alba) | 7 | bird | | |
| 2024-06-15 | Great Skua (Stercorarius skutilavus) | 1 | bird | | |
| 2024-06-15 | Black-headed Gull (Chlidonias niger) | 5 | bird | | |
| 2024-06-15 | Minke Whale (Balaenoptera musculus) | 2 | mammal | from the Oban Ferry | |
| 2024-06-17 | White-tailed Eagle (Haliaeetus leucocephalus) | | bird | | |
| 2024-06-17 | Frog Orchid (Phyllotrochilus pulchellus) | | plant | | |
| 2024-06-17 | Lesser Butterfly Orchid (Caladenia petrophila) | | plant | | |
| 2024-06-17 | Heath Fragrant Orchid (Drakaea purissima) | | plant | | |
| 2024-06-22 | Red-throated Diver (a pair on a loch and a single fly-over bird) | | bird | | |
| 2024-06-22 | Hen Harrier (separate male and female hunting) | | bird | | |
| 2024-06-22 | Pomarine Skua (flying low over the village late evening) | | bird | | |
| 2024-06-22 | Great Skua (x2) | 2 | bird | | |
| 2024-06-22 | Arctic Skua (x4) | 4 | bird | | |
| 2024-06-22 | Short-eared Owl (hunting late evening) | | bird | | |
| 2024-06-22 | Large Heath butterfly | | insect | | |
| 2024-06-22 | Magpie moth (mass emergence on the moorlands today) | | moth | Mass emergence on moorlands today. | |
| 2024-06-22 | Dark Green Fritillary | | butterfly | | |
| 2024-06-22 | Creeping Soft Grass (in abundance under Bracken - only once have we seen a single specimen of this essentially woodland species previously on Coll) | | plant | In abundance under Bracken - only once seen previously on Coll. | Rare sighting. |
| 2024-06-22 | Oyster-plant | | plant | | |
| 2024-06-22 | Purple Milk-vetch | | plant | | |
| 2024-06-22 | Sea Holly | | plant | | |
| 2024-06-22 | Moonwort | | plant | | |
| 2024-06-22 | Shrubby Sea-blite | | plant | | |
| 2024-06-22 | Northern Dead-nettle | | plant | | |
| 2024-06-24 | Swift (Apus apus) | 2 | bird | Cruising around Arinagour this afternoon. | First of year |
| 2024-06-25 | Red-throated Diver | | bird | | |
| 2024-06-25 | Hen Harrier (male and female) | | bird | Hunting | |
| 2024-06-25 | Hobby (Cyornis pictus) | | bird | A stunning male hunting from its perch on a power line pole. A very rare Hebridean visitor. | Rare |
| 2024-06-25 | Black-headed Gull | 2 | bird | No juveniles present. | |
| 2024-06-25 | Great Skua (Stercorarius skutilinus) | | bird | | |
| 2024-06-25 | Arctic Skua (Stercorarius arctica) | 5 | bird | Breeding behaviour evident. | |
| 2024-06-25 | Anania fuscalis | | insect | A day-flying Crambid moth in the machair. | |
| 2024-06-25 | Northern Colletes | | insect | Nationally rare solitary bee feeding at Pyramidal Orchid flowers in the machair. | Rare |
| 2024-06-25 | Spiny Mason Wasp | | insect | New for Coll if our id is correct! | New Species |
| 2024-06-25 | The Miller (Milleris thoracica) | | moth | In the moth trap with 15 other species. | |
| 2024-06-25 | Adderstongue Fern | 2 | plant | x2 spikes in maritime heath. | |
| 2024-06-25 | Silver Hairgrass | | plant | Very locally abundant in the western machair. | |
| 2024-06-25 | Noctilucent clouds | | other | A rare phenomenon high in the atmosphere overnight - amazing photos! | Rare |
| 2024-06-29 | Bog Orchid (Orchidaceae) | 12 | plant | tiny rarities in three small clusters in a Bottle Sedge bog. A first for us on Coll - or anywhere else for that matter! | First of year |
| 2024-06-29 | Heath Fragrant Orchid (Orchidaceae) | | plant | having a good year on Coll - plenty about | |
| 2024-06-29 | Pipewort (Ranunculus peltans) | | plant | lots of small flowering plants on muddy banks of loch - another Coll speciality | |
| 2024-06-29 | Lesser Marshwort (Callitriche palustris) | | plant | growing abundantly among the Pipewort | |
| 2024-06-30 | Woodpigeon (Columba palumbus) | 6 | bird | 6-8 pairs have bred on Coll this year - the same number as Hen Harriers! | Uncommon |
