Less than two months after the removal of dams restored a free-flowing Klamath River, salmon have made their way upstream to begin spawning and have been spotted in Oregon for the first time in more than a century.

Photos of the animal recently circulated widely online, prompting a flurry of debate about whether the animal was a wolf or just a dog.

Eric and Louise McLeod have been visiting their cabin south of Aklavik, N.W.T., for 25 years. On their most recent trip, they saw something they never had before.

A new plant species is establishing itself in the area and impacting native beach greens.

An observer reports unusual sightings of Sabine's gulls, including juveniles, outside their typical migration period, suggesting a potential new breeding colony near Nome.

RÚV received a video this week that shows a whale just off the beach at Reynisfjara; the second time in about a week. Guðjón Már Sigurðsson, marine biologist and cetacean expert at the Icelandic Marine Research Institute, says the whale swims shallow in a search for food.

Blue jays occur across southern Canada from Alberta east to Quebec and the Atlantic provinces.

A wolf has been sighted in Sokndal, near the coast of western Norway, an area where such sightings are rare, sparking discussions about potential risks and the possibility of issuing a culling permit.

Climate change has led to sightings of species like the European adder, spiders, and herons beyond their typical range in the Russian Arctic.