Plus: orcas are eating a toxic diet, southern birds are moving in on northern birds thanks to climate change, North Atlantic right whale population is steadying, and red swamp crayfish are showing up unwanted in Nova Scotia

Yvonne Drebert and Zach Melnick set out to make a documentary about invasive quagga mussels in the Great Lakes. Along the way, they found the wreck of what is likely the steamship Africa, last seen on a stormy October night in 1895.

How a cocktail of invasive species and global change is altering the Great Lakes-St. Lawrence River ecosystem

Agricultural expansion, invasive species, climate change blamed for decline in bird species worldwide

A porcine invader poses a serious risk to the province's agriculture industry and native vegetation