How do Russian and Pyrenean desmans move through water?

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Desmans are amphibious moles that have adapted to aquatic environments rather than burrowing through soil. Both the Russian desman and the Pyrenean desman possess specialized physical features for swimming, including water-repellent fur, partially webbed forefeet, and large, fully webbed hind feet fringed with stiff hairs.1

Their movement through water is characterized by the following:

Russian desman: This species swims by using both its hind feet and its tail for propulsion.1
Pyrenean desman: Although it is considered awkward on land, it is a fast and adept swimmer that propels itself primarily through the use of its strong hind legs and feet.1

While swimming, both species are able to close their nostrils and ear holes to navigate underwater effectively while searching for prey.1