Canada
Digges Island guards the entrance to Hudson Bay like a fortress of ancient stone — a rugged, uninhabited island of Precambrian rock rising from waters where the full force of the Arctic tides, some of the most powerful on Earth, crashes against cliffs that have withstood the assault for billions of years. The island takes its name from Dudley Digges, a patron of Henry Hudson's fateful 1610 expedition, during which the explorer sailed through this very strait before his mutinous crew set him adrift in the bay that bears his name — one of history's most notorious acts of maritime betrayal.
The cliffs of Digges Island host one of the largest thick-billed murre colonies in the Canadian Arctic — a gathering of over 300,000 breeding pairs that transforms the cliff faces into a living, screaming wall of black and white during the summer months. The colony's scale is almost incomprehensible from sea level: every ledge, every crevice, every horizontal surface is packed with nesting birds, and the air above the cliffs swirls with an unending vortex of incoming and departing birds that creates an almost hallucinatory visual effect. The murres share the cliffs with black-legged kittiwakes, common eiders, and glaucous gulls — the latter serving as opportunistic predators that snatch eggs and chicks from unguarded nests with ruthless efficiency.
The waters surrounding Digges Island are a critical feeding ground for marine mammals. Polar bears are regularly sighted on the island and the adjacent Cape Wolstenholme, attracted by the seal populations that congregate in the nutrient-rich tidal zones. Walrus haul out on the rocky shores in groups that can number in the dozens, their massive brown bodies crowded together on the granite shelves in an unending jostling for position that provides endless entertainment for observers aboard passing vessels. The tidal currents that sweep through the strait between Digges Island and the mainland create upwellings that bring cold, nutrient-dense water to the surface, fuelling a food chain that supports everything from plankton blooms to bowhead whales.
The surrounding landscape tells a geological story that spans nearly the entire history of the Earth. The rocks of Digges Island are among the oldest on the planet — Archean gneiss and granite formed over 2.5 billion years ago, when the Earth's atmosphere contained virtually no oxygen and life consisted of nothing more complex than single-celled organisms. The glacial erratics scattered across the island's surface — boulders transported and deposited by the continental ice sheets that retreated barely 8,000 years ago — add a more recent chapter to this deep-time narrative, while the raised beaches visible at various elevations above the current waterline record the island's slow rebound as it continues to rise, freed from the crushing weight of ice that was, in geological terms, only moments ago.
Digges Island is visited by expedition cruise ships navigating between the Atlantic and Hudson Bay, with wildlife viewing typically conducted from the ship or from Zodiacs when conditions permit. The season is brief — late July through early September — and ice conditions determine accessibility. The island's exposed position at the mouth of Hudson Strait means that fog, wind, and sea state can change rapidly, and flexibility is essential. For those who experience it in favourable conditions, Digges Island delivers one of the Canadian Arctic's most spectacular wildlife encounters — a place where the sheer density of life, concentrated on these ancient cliffs and in these churning waters, contradicts every assumption about Arctic scarcity.