Travel photographer and blogger Liz Carlson snapped the pictures of the discolored snow-capped glaciers on November 28 while on a helicopter flight around Mount Aspiring National Park, in New Zealand's South Island.
"After we flew deep into the park around the Kitchener Glacier, I could really see how red it was, and it was shocking, I've never seen anything like it before," Carlson told CNN.
"Often at the end of summer the glaciers can appear dirty, even gray with all of the snowmelt and bits of black rock on them, but this was the height of spring so it was really bizarre."
"The ice was coated in a way that gave it a pinkish-red tinge," she added.
Australia has been experiencing one of its worst bushfire seasons on record. As of Thursday, there were more than 117 bush and grass fires with more than 60 not yet contained, according to the New South Wales Fire Service.
Westerly winds blew the smoke from the Australian fires toward New Zealand.
The heavier particles in the smoke fall out and, in this case, discolored the snow in New Zealand, according to CNN meteorologist Monica Garrett.
Until the material on the glaciers is tested, it is not possible to know for sure what material it is, Garrett said.