The rough-legged hawk obviously likes cold weather. In the winter, you can see the bird in open country around the Bitterroot Valley. Then it migrates - north. That's right. The birds head up to the tundra on the north edge of Canada to raise families. Bob Danley of the Bitterroot Outdoor Journal has seen the hawk on power poles in the valley floor. It hovers while looking for voles, mice, and shrews, then swoops in on its prey.

tree sparrow
American Tree Sparrow (Bob Danley Photo)
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It's less blood-thirsty around your backyard feeder, where the American Tree Sparrow (photo above) is fattening up before it migrates - again to the north, though not as far north as the hawk. Other birds are around. For instance, in open water and in streams, you might see the Gadwall dabbling duck or the Ring-necked duck (photos below). Both are regularly seen at the Lee Metcalf National Wildlife Refuge near Stevensville. The Gadwall dips its head down under the water to feed, while the Ring-necked duck dives completely underwater to grab its meal.

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Male and female Gadwall ducks. (Bob Danley photo)
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ring-necked ducks
Female and male Ring-necked ducks. (Bob Danley photo)
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The Gadwall male duck is gray with a black bill and black butt, while the female is brown with orange edged bill. Meanwhile, the Ring-necked duck male has a purple head with a black back and females have brownish bodies.

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Also at the refuge, Bob saw a muskrat on the edge of a pond. The 20-inch long mammal doesn't hibernate, but its lodge is a pleasant place to be, with temperatures around 60 degrees, even on days when the outside temperature is 0 degrees. The muskrat is an omnivore, but mainly eats vegetables throughout the year. It is the largest member of the Vole family and is dark brown with short round ears. And, it can swim underwater for up to 15 minutes at a time.

wintertime muskrat
A muskrat chomping on veggies at Metcalf Refuge Pond 5. (Bob Danley photo)
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And there's always lichen for some winter color. This week, Bob highlights the Varied Rag lichen, which can be found mainly on trees, but also on rocks. It looks like a greenish-grey crumpled rag (photo below). It can be about six inches in diameter.

varied rag lichen
Varied Rag lichen along the Bass Creek Trail. (Bob Danley photo)
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The Woodland-Star wildflower has sprouted leaves and will flower in mid-March. That's another indicator that spring is on schedule. Until then, stay warm. The Bitterroot Outdoor Journal is heard Wednesday mornings at 7:45 on 1240 KLYQ Radio and at www.klyq.com.

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LOOK: Here are the pets banned in each state

Because the regulation of exotic animals is left to states, some organizations, including The Humane Society of the United States, advocate for federal, standardized legislation that would ban owning large cats, bears, primates, and large poisonous snakes as pets.

Read on to see which pets are banned in your home state, as well as across the nation.