Roland Seitre / Black-footed Ferret (Mustela nigripes) in burrow, North America

Roland Seitre / Black-footed Ferret (Mustela nigripes) near burrow, native to North America

Roland Seitre / Wildlife biologist Valery Kopsco, with a young Black-footed Ferrets (Mustela nigripes), part of a reintroduction project at Bowdoin National Wildlife Refuge, Montana, March 2002.

Roland Seitre / Black-footed Ferret (Mustela nigripes) seen in its burrow. The species is endangered on account of prey depletion and vulnerability to foreign infection. Declared extinct in the wild in 1987, a succes...

Roland Seitre / Black-footed Ferret (Mustela nigripes). The species is endangered on account of prey depletion and vulnerability to foreign infection. Declared extinct in the wild in 1987, a successful breeding progr...

Jim Brandenburg / Black-footed Ferret (Mustela nigripes) smelling ground, Wyoming

Sumio Harada / Black-footed Ferret (Mustela nigripes) emerging from burrow in ground, recently released from captive breeding program onto the Fort Belknap Indian Reservation, Montana

Sumio Harada / Black-footed Ferret (Mustela nigripes) emerging from burrow in ground, recently released from captive breeding program onto the Fort Belknap Indian Reservation, Montana

Sumio Harada / Black-footed Ferret (Mustela nigripes) emerging from burrow in ground, recently released from captive breeding program onto the Fort Belknap Indian Reservation, Montana

Jim Brandenburg / Black-footed Ferret (Mustela nigripes) peering from burrow, Wyoming

Roland Seitre / Black-footed Ferret (Mustela nigripes) sticking out tongue, native to North America

Donald M. Jones / Black-footed Ferret (Mustela nigripes) at night, UL Bend National Wildlife Refuge, north-central Montana