Flying back and forth over Cape Cod Bay, a survey plane spotted a half dozen of the world’s rarest creatures: North Atlantic right whales. Such sightings are good news. The species hovers near extinction—by one estimate, fewer than 360 remain. Each time researchers locate a whale, they take pictures...

The jogger crossed Francis Scott Key Bridge every day—and every day, she saw the goose underneath it. Worried the bird was stuck, she called the Humane Rescue Alliance in Washington, D.C. The lower bridge was only accessible by boat, but thanks to HRA’s relationship with a local fire department...

The suspect creeping up near my front fence was a tough character—broad-leafed and thick-stemmed and threatening to invade my property and swallow it whole if I didn’t act fast. There was no hesitation that summer morning as I headed to work: Off with his head! It was a decision made all too easy by...