The actions of a nurse who killed vulnerable patients in her care were the "most egregious" Ontario's nursing regulator has ever seen, the body said.

A Bird Studies Canada team is researching barn swallows to understand why their population in Ontario has plummeted since the mid-60s.

Neonicotinoids are an insecticide that coats seeds for crops like corn and soy to protect it against insect pests, but since it is water soluble, it is mobile.

"This is a real coup," said Maria Adcock, who lives nearby. "This is a beautiful area that shouldn't be developed and this discovery should help save the forest."

Monkeys, kangaroos, camels and other exotic animals are being sold at auction as Ontario is considering legislation.

Canada's most populous city has an exotic animal problem. To deal with the issue, the city has launched a wide-ranging consultation on prohibited animals.

Slow-learning bumblebees are just as successful as smart ones and live longer, suggests a new study.

An evacuation due to flooding fears is underway at a remote First Nation community in northern Ontario.

A group of Canadian researchers say they have, for the first time, successfully raised wasps that will be used this summer as a weapon against an insect that is ravaging forests.

A significant fuel spill caused when a tanker truck crashed northwest of Toronto has been contained, police said Tuesday as crews continued to clean up the area.