In autumn, hundreds of thousands of Swainson's Hawks migrate to South America. With the help of a satellite tracking device, let's follow an individual male. On September 14, he leaves his breeding territory near Hanna, Alberta; reaches southwest Saskatchewan by September 23; passes…

It's dawn in a western marsh in mid-summer, and man! Those birds are singin'! The males of more than a dozen species are staking out their territories and attracting mates. One of the noisiest of all is the Red-winged Blackbird. He sings not to attract just one mate, but to gather a whole…

In the 1990s, train engineers in Japan built trains able to travel nearly 170 miles per hour. The problem was that when the trains exited a tunnel, the air in front of their bullet-shaped noses expanded rapidly, creating a loud “tunnel boom.” The chief engineer, a birder, looked to the…

What an amazing array of sounds birds have to offer! The call of a male Yellow Rail sounds like someone tapping two small stones together. And Turkey Vultures hissing at one another over a carcass sound like a snarling lion. The duet between the male and female Barred Owls seen here is…

Around this time of year, many baby birds are begging their parents for food. A Hairy Woodpecker chick calls from its nest carved deep within a dying tree. A Great Horned Owl juvenile reminds his parents "Hey! I'm over here! Feed me!" Moving from forest to water, we find this American Coot…

Nearly all birds produce sound through an organ unique to birds, the syrinx. In many songbirds, the syrinx is not much bigger than a raindrop. Extremely efficient, it uses nearly all the air that passes through it. By contrast, a human creates sound using only 2% of the air exhaled through…

Heidi Hoelting, a musician, listens carefully to the songs of birds. In her piano studio at her home in the woods, she wrote down several variations of the different sounds a Song Sparrow makes. In this BirdNote, Nancy Rumbel plays some of those variations on a bamboo whistle. Listen to…

During winter and early spring, Great Blue Herons build their nests high in the treetops. The male delivers the supplies to the nest site stick by stick, as the female arranges things. It’s the perfect childhood home for their young, made without blueprints, architects or engineers. But by…

A fledgling Great Horned Owl calls to be fed. Judging from the young bird's persistence, the parents seem to be responding only with calls, not with food. These entreaties can go on for weeks. Both parents let the fledgling know that it's time for him to feed himself. They've been bringing…

Since it’s often hard to see a bird, veteran birders characterize the sounds of birds in order to identify them. So what words do they use? Well, they use “whistle,” for example, to describe the sound of this Olive-sided Flycatcher. And "rattle" for that of the Belted Kingfisher. There's…