Milkweed plants are important to Monarch butterflies, which depend on milkweed to raise their caterpillars. But Monarchs aren’t the only ones who benefit from milkweed. Scientists once documented hundreds of insect species they found eating some part of the common milkweed plant –…

In spring and summer, the paths around local ponds might have some fluffy obstacles: young goslings along with their caring and defensive parents. Adult Canada Geese lose their flight feathers for several weeks in the summer, often while they’re raising a brood of goslings. Without the…

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…

Elegant Black Terns breed in summer on secluded wetlands across the northern states and Canada. Because of major losses of wetlands in their breeding range — especially in Canada's prairie provinces — Black Tern numbers have dropped dramatically since the 1960s. The future of this…

While nearly a third of North American bird species are in decline, many birds that depend on wetlands are thriving. Duck breeding populations in 2009 were an estimated 25% above historical averages. Conditions on the breeding grounds have improved since the drought years of the 1980s, but…

Noticeably smaller than Mallards, Blue-winged Teal wings have large patches of powder blue edged in emerald. Blue-winged Teal are long-distance migrants, traveling from nesting areas in Canada and the U.S. to South America for the winter. They feed in shallow water with a preference for…

When nesting, most birds lay a predictable number of eggs. Bald Eagles: 2. Bluebirds: 4 to 6. Mallards: 10 to 12. But how do they determine when they have laid the right number? To find out, scientists experimented by going to nests and repeatedly removing eggs soon after they were laid…

What’s the most colorful bird in the U.S.? The Scarlet Tanager? Maybe the Painted Bunting? Well, consider one more lustrous candidate: the Purple Gallinule. The Purple Gallinule’s feathers are so iridescent that they might not seem real. Despite its bold style, a Purple Gallinule can be…

After they leave the nest but before they take flight, many baby birds - especially robins and flickers - spend time on or near the ground. If you see such a baby bird, and your first thought is to "rescue" it, the better thing to do is let it be. Protect it from cats. Then watch from a…

Cliff Swallows gather in spring, in nesting colonies of up to 3,700 nests. Look for swarms of them under bridges, under the eaves of barns, or even the side of your house. The swallows use mud to make gourd-shaped nests - side by side and jumbled together. Watch the video! And Cliff…