Bighorn sheep have made a big comeback in recent years, but some developers out West think they're intruders
Long considered black devils with wings, these bats today are stealing hearts – and mangoes – across Australia
A real fish tale hangs on a monster marlin caught nearly a half-century ago
For the National Zoological Park, an artist depicts the diversity of the islands' extinct avian species
It may look fuzzy and adorable but this New Zealand bird is one tough customer
Long displayed, long dispersed, the famous Hornaday bison "family" is reunited in a new home
They're slimy, snaky, ugly and repulsive, but once you acquire a taste for this much-maligned species, "slippery as an eel" becomes a compliment
Still used as "dancing bears," they can hold their own with the big cats but not with human expansion
For the National Zoo's esteemed senior citizens, only the very best in geriatric medical care will do
Monarchs of the mountain West, they once ranged all the way to the Eastern Seaboard. Now they are coming home
The beluga whales of Canada's St. Lawrence River have endured a lot over the years, but they're still around, and still controversial
In competition, workaholic Border collies fetch, pen and shed to prove they have the right stuff
A government report takes a look at what we have left and where we are heading
Conservation and research remain key elements in the National Zoo's ever-expanding programs
Was it a scorpion? A spider? A snake? The toxin experts at APDIC can tell you what to do
Oh yes, it's a touchy-feely creature all right, but the collared peccary, or javelina, has very big teeth and it knows how to use them
Never mind its savage reputation. The piranha is a pussycat most of the time
A Smithsonian scientist studies the relationship between Eocene insects and the plants they ate
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