Channel Islands wildlife and seals: where to see nature across five islands
Where to see wildlife in the Channel Islands?
Best wildlife spots in the British Channel Islands: Atlantic grey seals at St Catherine's Breakwater (Jersey) and around Herm's outer rocks year-round; puffins at Burhou islet (Alderney, April–July) and Herm's Puffin Bay (spring); northern gannets at Les Etacs (Alderney), one of the world's largest gannet colonies; Durrell Wildlife Conservation Trust (Jersey Zoo) for rare endangered species; and dolphin sightings on the Jersey scenic cruise route. Sark's coast is excellent for grey seals from the kayak.
Wildlife in the British Channel Islands
The British Channel Islands occupy a biogeographically interesting position: warm enough to host species at the northern edge of their Atlantic range, cold enough for full temperate marine communities, and remote enough — particularly the smaller islands — for wildlife to persist in forms largely absent from mainland Britain and France. The tidal environment, with its dramatic 12-metre range in spring tides, creates rich intertidal zones. The absence of cars on Sark and Herm reduces disturbance. And the combination of agricultural land, coastal heathland, and clean marine waters supports an unusually diverse wildlife assemblage for such a small land area.
This guide covers the main wildlife highlights across all five islands: where to go, when to go, and what you realistically expect to see.
Atlantic grey seals
Jersey: St Catherine’s Breakwater and east coast reefs
Atlantic grey seals (Halichoerus grypus) are the most reliably observed large marine mammal in the British Channel Islands. Jersey has a resident population of approximately 50–70 individuals, concentrated on the east coast reefs between St Catherine’s Breakwater and Gorey.
St Catherine’s Breakwater: The long Victorian pier at St Catherine’s Bay is the most accessible seal-watching spot in Jersey. Grey seals regularly haul out on the rocks at the base of the breakwater and around the outer reef. The best time is a couple of hours either side of low tide, when the rocks are exposed. Early morning and evening are quieter. The seals are habituated to human presence but should not be approached closer than 30 metres.
The Ecréhous reef: The Ecréhous islets (approximately 10 km northeast of Jersey) have a larger population and more reliable sightings — the reefs provide undisturbed hauling areas and good fish supply. Access requires a boat; see channel-islands-boat-trips for options.
Herm: outer rocks and kayak approach
Herm’s outer coast — the rocky northeast and east shore beyond Shell Beach — has regular grey seal presence throughout the year. The Puffin Bay area in spring is particularly active, with seals often seen resting on rocks visible from the cliff path. Kayak approach allows quiet, close viewing without disturbing the animals; see channel-islands-kayaking for the Herm puffin patrol kayak, which passes through seal habitat.
Book the Herm puffin patrol kayak tourSark: kayak and cliff watching
Sark’s undisturbed east coast cliffs provide habitat for a small but consistent grey seal population. The guided kayak tour from Sark’s Creux Harbour passes the main seal hauling areas. From the cliff path, seals are sometimes visible on rocks below — particularly on the east coast between Creux and Derrible Bay at lower tides.
Puffins
Alderney: Burhou islet
Alderney’s Burhou islet, approximately 1.5 km west of Braye Harbour, hosts one of the largest Atlantic puffin (Fratercula arctica) colonies in the Channel Islands: approximately 400–500 breeding pairs at peak season. Puffins are present from late March to late July, with the peak of activity in May and June when both adults are attending the burrow.
Access to Burhou itself is restricted during the nesting season to protect the colony. However, the puffins are clearly visible with binoculars from Alderney’s Hannaine Bay and the northwest coast path — and the colony is large enough that substantial numbers are visible in flight and on the water surface. The Alderney Wildlife Trust organises occasional guided sessions during the season.
Explore Alderney nature experiencesFor the Alderney Bird Festival (October), which celebrates the island’s birdlife beyond the summer breeding season, see Alderney Bird Festival guide.
Herm: Puffin Bay
Herm has a small puffin colony at the northern end of the island — historically larger but now with fewer breeding pairs following population pressures across the Atlantic seaboard. In spring (April–early June), puffins can be seen flying to and from the colony in the early morning. The guided kayak tour from Herm specifically targets this colony during the nesting season.
The colony is not as large or reliable as Burhou, but the setting — a small island you can walk around in two hours — makes it feel more intimate than many puffin-watching sites.
Gannets
Alderney: Les Etacs (the Garden Rocks)
Les Etacs, a group of small sea stacks just offshore from Alderney’s southwest coast, holds one of the largest and most accessible northern gannet (Morus bassanus) colonies in the British Isles: approximately 7,000 nesting pairs, and growing. The stacks are visible from Alderney’s western cliffs and from Hannaine Bay, and the spectacle of a gannet colony in full breeding activity — thousands of large white birds covering every ledge, diving for fish in the surrounding waters — is one of the most spectacular wildlife sights available in the British Channel Islands.
Gannets are present at Les Etacs from late January through to September. Peak activity is April to July. The diving behaviour — gannets plunge-dive from up to 30 metres, folding their wings back at the last moment — is best observed from the water, but entirely impressive from the clifftops.
This colony, combined with the Burhou puffin colony, makes Alderney the most important wildlife destination in the British Channel Islands for seabird enthusiasts.
Durrell Wildlife Conservation Trust, Jersey
Durrell Wildlife, located at Les Augres Manor in Trinity parish in northern Jersey, is the most significant wildlife conservation organisation based in the British Channel Islands — and one of the most influential zoo-based conservation organisations in the world. Founded by the author and naturalist Gerald Durrell in 1963, the charity focuses on breeding endangered species for reintroduction into the wild.
The zoo is open year-round and houses several hundred species, including:
- Mountain chicken (Leptodactylus fallax): a giant frog from the Caribbean, of which only a few hundred remain in the wild, with Durrell managing a captive insurance population.
- Livingstone’s fruit bat: one of the largest fruit bats in the world, in a walk-through flight cage.
- Western lowland gorilla: Durrell has been involved in gorilla conservation for decades; the Jersey group is particularly well-established.
- Rodrigues fruit bat, Sumatran orang-utan, and numerous reptiles from Madagascar.
Beyond the animal collection, the estate grounds — approximately 32 acres of parkland around a 19th-century manor house — are themselves a pleasant walk. The education and research programmes at Durrell are the reason for the zoo’s international reputation; what looks like an attractive animal park is actually a sophisticated conservation genetics and breeding operation.
Allow 3–4 hours for a full visit. The zoo is located approximately 8 km north of St Helier; car or taxi is the most convenient approach, though a bus service connects Trinity parish from St Helier.
Marine wildlife and dolphin watching
Common dolphins and bottlenose dolphins
The waters around the Channel Islands — particularly in the deeper channels between the islands and in the major ferry routes — support populations of common dolphins (Delphinus delphis) and bottlenose dolphins (Tursiops truncatus). Sightings are possible from any inter-island ferry crossing and from open headlands in calm conditions, but they are not guaranteed.
The Jersey scenic boat cruise route passes through productive dolphin habitat on its south coast section:
Book the Jersey scenic cruiseBasking sharks
Basking sharks (Cetorhinus maximus) are seasonally present in the Channel Island waters during summer (June–August), feeding on plankton concentrations. Sightings are unpredictable but occur annually around the outer reefs of all five islands. They are entirely harmless — a basking shark close to a kayak is an extraordinary experience.
Rock pools
The extreme tidal range of the Channel Islands exposes intertidal zones of unusual richness at low tide. Low spring tide at Jersey’s north coast bays — particularly Grève de Lecq and the reefs off St Catherine’s — reveals rock pool communities including spiny spider crabs, several species of blenny, sea anemones, small wrasse, and occasionally octopus. The reefs at Lihou Island (Guernsey) are equally rich.
Birds
Resident and migratory species
Beyond the seabird colonies, the Channel Islands support a range of bird species notable for their position at the intersection of Atlantic and Continental European ranges. Key species and locations:
Red-legged partridge: More commonly seen in the Channel Islands than in mainland Britain, particularly in the agricultural interiors of Jersey and Guernsey. Listen for the call at dawn in farming areas.
Cirl bunting: A species that has almost disappeared from England but is present in the Channel Islands, particularly in the southern farmland habitats of Jersey.
Dartford warbler: Resident on the coastal heathland of Jersey’s western and southern coasts. The gorse heathland at Les Quennevais is a reliable location.
Lapwing and golden plover: Winter flocks in the agricultural zones of all larger islands.
Short-eared owl: Occasional in winter on all islands, hunting rough grassland near the coast.
Raven: Breeding on the cliff faces of Sark and Alderney; occasionally at Guernsey’s south coast.
La Société Guernesiaise and La Société Jersiaise
Both islands have active natural history societies that run guided wildlife walks and publish records. La Société Jersiaise maintains the Jersey Biodiversity Centre with records of species distribution across the island. La Société Guernesiaise runs botanical and zoological sections with regular field meetings. Both organisations are welcoming to visiting naturalists.
Marine protected areas and conservation
The British Channel Islands are within several marine protected areas. The Ramsar wetland designation covers the inter-tidal areas of Les Mielles in Jersey; the Alderney waters are within a proposed marine protected zone. The States of Jersey and the States of Guernsey maintain separate frameworks for marine conservation.
The main practical implication for visitors is that collecting marine life from the rock pools is not permitted, and approaching seal or seabird colonies to within harassment distance (generally considered to be 30–50 metres) is an offence under local wildlife legislation.
Seasonal calendar for wildlife
| Month | Main wildlife activity |
|---|---|
| March–April | Puffin arrival (Burhou, Herm), gannet colony activating (Les Etacs) |
| May–June | Peak puffin season, gannet chick rearing, basking shark season begins |
| July–August | Young seabirds fledging, dolphin activity peaks, Alderney Bird Festival (October) |
| September–October | Bird migration through all islands; Alderney Bird Festival (October) |
| November–February | Grey seals present year-round; winter waders and wildfowl on coasts |
Related guides
- Things to do in Jersey — full Jersey activities including Durrell
- Things to do in Guernsey — Guernsey nature and activities
- Channel Islands kayaking — paddling past seals and seabirds
- Channel Islands coastal walks — walks with wildlife viewing opportunities
- Alderney puffin watching — dedicated Alderney puffin guide
- Alderney Bird Festival guide — October bird event
- Things to do in the Channel Islands — five-island overview
- Herm day trip from Guernsey — day trip with puffin and seal watching