Birds that historically nested in the cavities of dead trees are finding natural nest holes harder to come by — but people can help. Many of these species will make use of a nest box in parks or near people’s homes. Learn how to build nest boxes tailored to a species of your choice at…

Developing eggshells requires a key ingredient — calcium — in larger quantities than the female typically has in her bloodstream. Just how different bird species supply or store calcium for egg-laying isn’t fully known. While some species seek out extra calcium from their environment, many…

Most duck species court and form pair bonds in winter. In the icy waters of Vermont’s Lake Champlain, Common Goldeneyes are getting hot! This male is displaying his signature move, the “head-throw-kick,” to attract a mate. Goldeneye pairs now bonding throughout the US will migrate in early…

The word “dove” might make you think of an elegant bird symbolizing peace, while the word “pigeon” might bring up images of rowdy flocks of city birds. But there’s no formal distinction between doves and pigeons, only a linguistic one. In many languages, the birds are one and the same. The…

Juan Pablo Culasso is a nature recordist based in Colombia. Here, he describes how he uses a parabolic microphone to record a singing bird. Juan Pablo is blind, so he uses his hearing to pinpoint a small bird in dense vegetation.

In the depths of winter, when open water is frozen over, it can be challenging for birds to stay hydrated. Some birds eat the frozen water all around them. Cedar Waxwings catch snowflakes in mid-air. Black-capped Chickadees drink from dripping icicles. Plenty of other birds scoop up fresh…

A single Canada Goose has between 20 and 25 thousand feathers. Some are designed to help the bird fly or shed water. Many are the short, fluffy kind, the down that insulates the bird from the cold. Birds survive in sub-zero weather by fluffing their feathers, creating layers of air and…

The hoots of the Greater White-fronted Goose inspired a nickname, the “Laughing Goose.” A little smaller than Canada Geese, these gray-brown birds are named for the band of white around the base of their pinkish-orange bills. Greater White-fronted Geese are strong, athletic fliers. When…

There are five million bird eggs stowed away in museums across the world — and the study of eggs, called oology, can give us great insight into birds. The link between DDT and the decline of Peregrine Falcon populations was identified in part using museum and personal egg collections, and…

Every summer, puffins — like this Horned Puffin — grow blazingly colorful layers over the bases of their huge beaks. But in the winter, puffins lead very different lives, and they shed their bright ornamentation. Puffins in winter are largely solitary — and silent. They spend about seven…