Plus: “Poptart” the humpback whale spotted with newborn calf, world-record poison ivy found in Ontario, wing spots give monarch butterflies migration boost, and the ups-and-downs of mountain chickadee breeding

Plus: Orca missing out on the fattiest fish, the happy decline of humpback whale song, the 3,000-year-old caribou calving grounds and B.C.’s crabby green-shelled army

Are icebreakers ruining narwhals’ summer getaway? Plus, Montreal’s whale-ward minkes, Canada’s first North Atlantic right whale visit of the year, a new K pod baby, and humpback and orca continue to clash

"John doesn't need a bathroom break anymore," quips a paddler offscreen

World Wildlife Fund cautions that fishery management must take entire local ecosystem into account