Vertical scale: frequency (0-2500 hertz); horizontal scale: time (1 frame aprox. equal to 2 seconds); color: signal strength (from lowest to highest, violet, blue, green, yellow, orange, red). This is ...

Wild wolves play an essential ecological role, so researchers must be able to track them accurately. Unfortunately, because wolves travel over wide ranges, tracking them visually is very difficult.

As far as calls of the wild go, howling is among the most mesmerizing—but not many animals do it. For this Saturday's Weird Animal Question of the Week, we thought we'd listen in to the howling ...

The hair-shedding cousin of the wolf lounging on your couch may have a wild reason for barking at the postman or howling when an ambulance, fire engine or police car streaks by with its siren blaring.