Austin heads to Western Canada's Great Bear Rainforest to photograph a full-grown grizzly; he's timed his mission to coincide with the annual salmon run, which lures bears of all sizes out into the open for feeding.

Austin heads to Western Canada's Great Bear Rainforest to photograph a full-grown grizzly; he's timed his mission to coincide with the annual salmon run, which lures bears of all sizes out into the open for feeding.

Austin heads to Western Canada's Great Bear Rainforest to photograph a full-grown grizzly; he's timed his mission to coincide with the annual salmon run, which lures bears of all sizes out into the open for feeding.

Austin heads to Mexico in search of one of the most elusive snakes in the world, the Tzabcan rattlesnake; he also encounters a boa constrictor, a coral snake, and a troop of howler monkeys.

Austin heads to Mexico in search of one of the most elusive snakes in the world, the Tzabcan rattlesnake; he also encounters a boa constrictor, a coral snake, and a troop of howler monkeys.