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Across the tranquil waters of Canada’s vast network of lakes and rivers, a quiet invader is on the move. The spiny water flea, Bythotrephes cederströmii, is a microscopic predator that is forever altering the ecological fabric of aquatic habitats in Canada.

Islands have long intrigued explorers and scientists. These isolated environments serve as natural laboratories for understanding how species evolve and adapt.

The global aquaculture industry has tripled in size since the year 2000, with producers raising a mind-boggling diversity of species, from seaweeds and clams to carp, salmon and cuttlefish. Many of these creatures are undomesticated and lead complex and highly social lives in the wild.

True cause of why southern resident killer whales are on brink of extinction becomes murkier as conservationists warn of marine noise and ship traffic

Critically endangered Blue Mountains birds’ song culture undergoing shift as more complex call ‘disappears from the wild’

As humpback and southern right whales return to Antarctica at the tail end of their annual migration, east coast whale watchers may think the show will soon be over. But some whale species are still here, possibly year-round. And we need to find out more about them.

They came a long way from sub-Saharan Africa to eastern France -- but now the Egyptian geese are quite at home there and are chasing out local ducks and swans, just one symptom of the world's biodiversity crisis.

Down a dirt track in Colombia, deep in a forest, conservationists are breeding prized exotic frogs to try to undercut traffickers who are plundering the country's jungles of its amphibians.

Editorial: These remarkable fish need clean rivers to breed in. Their decline highlights the collapse of environmental regulation

The sudden demise of several monkeys has left Hong Kong zoo officials baffled as they struggle to identify the cause of the deaths.

Mikhail Pichugin was found starving and exhausted beside the bodies of his brother and young nephew