Every March sees the annual spring migration of Tree Swallows. Most of these swallows spend the winter along the Caribbean, in Central America, and in the warmest parts of South Texas and California. Some will nest as far north as northern Alaska and Canada. Tree Swallows nest only in
Tree Swallows glisten in the June sunlight, as they swoop and glide, their arcs interlacing in the air. When a white feather flutters down among them, one swallow snatches the feather in its bill and flies upward, as another gives chase. After a moment, the lead bird lets loose the feather
Tree Swallows and bluebirds — like this Western Bluebird — are among the earliest northbound migrants to arrive, heralding spring a month before the equinox. These species will nest only in cavities, such as old woodpecker holes or man-made nestboxes. But the supply of specialized nest
As the sun sets over the Connecticut River, as many as 300,000 Tree Swallows gather on the wing in one huge, tightly choreographed flock. With dusk at hand, the aerobatic flock - now shaped like a tornado - swoops down into the tall reeds. It takes but 15 seconds for the 300,000 birds to
At a glance, swallows and swifts, both graceful fliers, look much alike. But swifts — like this Chimney Swift — have longer, slimmer wings and short bodies, enabling them to glide for long periods. Their glides are punctuated by rapid, stiff bursts of wing-beats. Swallows, on the other
Winter's weak light is finally beginning to strengthen, and some birds, long absent, have begun their journeys north. Tree Swallows, such as this one, phoebes, bluebirds, and more return with the light. So be of good cheer, the birds and spring are coming back. You can learn more about
Most swallow species that nest in North America eat almost nothing except flying insects. When the bugs die off in the fall, the swallows head south to winter in the tropical zones of Central and South America and the Caribbean. However, Tree Swallows can also eat small fruits. If Tree
In some vineyards of Napa and Sonoma Counties in California, owls patrol by night, and kestrels, harriers, and other raptors take the day-watch. They eat the mice, rats, and gophers that nibble on the roots of young grapevines. Other birds help, too, including this Western Bluebird
