Tiny Marsh Wrens live in wetlands, usually within cattails, reeds, or bulrushes. After choosing his territory, the male weaves up to 15 dome-shaped shells, lashing together cattails, grasses, or reeds. These are called "courting" nests. Then, sitting high atop a perch in the marsh, he…

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…

Just because a young bird appears to be alone – whether on the ground or squawking loudly from a bush or tree – doesn't necessarily mean it is sick or injured. In June, young birds, including this juvenile Northern Flicker, are leaving their nests. And most likely, a parent is near-by and…

A male American Golden-Plover proclaims its nesting territory with an aerial display known as the "butterfly flight." After flying up 50 feet, the plover switches to slow motion, raising its wings languidly until the wingtips nearly touch over its body, then lowering them gradually until…

The Northern Hawk Owl is one of the least studied and least known of all birds in North America. Northern Hawk Owls are owls, but they share several traits with hawks and falcons: A streamlined body shape, daytime hunting habits, and stiff wing feathers for daytime hunting. (Owls that hunt…

Some gulls and terns may show a glowing pink color, similar to that of flamingos and spoonbills. This pink color comes from pigments in the birds' food called carotenoids. These gulls and terns are able to convert these naturally occurring pigments to hues that may enhance their success at…

Resident Cooper’s Hawks that nest in the urban areas of Albuquerque, New Mexico, are thriving as the populations of doves, their prey, have exploded. The easy prey gives the urban birds a competitive advantage over hawks in more natural habitats, where prey is less concentrated. The…

Many birds – like this Indigo Bunting – can be found in ecotones, the borders between two habitats. Indigo Buntings breed in the ecotone between forest and meadow. They are common at Muscatatuck National Wildlife Refuge in Indiana, where grassland and forest are interspersed to produce…

As darkness descends on a May evening, the voices of many birds go quiet. But for some birds, especially those known as nightjars, the music is just beginning! An Eastern Whip-poor-will shouts out its name. The call of a Common Poorwill echoes across a canyon. A Common Pauraque calls from…

Waterfowl like this Muscovy duckling spend up to 30 days in the egg, so they’re able to walk, swim, and feed themselves as soon as they hatch. We call these chicks precocial. By contrast, the chicks of most songbirds spend less time maturing in the egg. They must continue to develop in the…