Six Simple Rewordings
Reindeer can smell lichen even when it's hidden under snow.
With a strong nose, reindeer find lichen that lies beneath the snow.
Reindeer use their great sense of smell to detect lichen under the snowy cover.
Even under snow, reindeer can sniff out lichen they need.
Due to their keen nose, reindeer can locate lichen buried by the snow.
Reindeer find lichen by smell, even when the snow hides it from view.