Roger Di Silvestro’s Archive

Yellowstone National Park gray wolf

For Dog Appreciation Month: The Origin of Domestic Dogs

April is Dog Appreciation Month, a good time for asking where in the wild these four-footed companions originally came from. For many years, scientists interested in canine evolution speculated that …

Frog in Costa Rica by Lise U. Chase

National Frog Month: 6 Ways to Tell If You Are a Frog

  A concerned reader writes: “I hear that April is National Frog Month, so I would like to know, how do I tell whether I am a frog?  And if …

In southwestern Virginia, redbuds bloom in spring

5 Ways to Tell Spring Has Arrived

National Wildlife Federation Conservation Hall of Fame honoree Henry David Thoreau wrote in his journal on March 17, 1857, “No mortal is alert enough to be present at the first …

Moonrise Homer Alaska 311203 Doug Kaufman

Wake Up!! Sleep Secrets from the Animal Kingdom

Wake up!  We’re in the middle of National Sleep Awareness Week (March 3-9)!  This is no time to be dozing!  But it is a perfect time to take a look …

Polar bear

International Polar Bear Day: 13 Things You May Not Know about Polar Bears

In honor of International Polar Bear Day, which falls each year on February 27th, here are a few things about the celebrated bruin that may amaze and amuse you: The …

Alaska Brown Bear on Admiralty Island by April Carpenter

President’s Day: How Animals Lead

President’s Day weekend was set aside to honor the memory of our first president, George Washington,  celebrating his skillful leadership at the dawn of our history as a nation. Leadership …

giraffe, Tanzania, Africa

Valentine’s Day: Some Animals Really Have Heart

Valentine’s Day is the traditional holiday for giving away hearts. But how does a healthy human heart—a hollow ball of muscle about the size of a clenched fist that beats …

Gray wolf

Changing Times for the Gray Wolf

Political, social and cultural progress on conservation issues are often slow in arriving, but when seen from atop the arc of time, the progress conservationists have made on some issues …

10 Ways NWF Has Helped Your Children

This year, NWF celebrates the 75th anniversary of its founding as a coalition of conservation groups seeking to make the nation safer for wildlife and wild places. NWF focused early …

10 Things You May Not Know About Groundhogs

The groundhog, also known as the woodchuck or the mouse bear (because it looks like a miniature bear when sitting upright), first won its reputation as a weather prognosticator in …

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Celebrate Garden for Wildlife Month