 Their loud flight calls warn of the presence of potential predators. Avid birdwatchers, particularly on the East Coast, use binoculars or telescopes to observe flocks flying across the face of the moon. Among the most welcome features of spring is the renewal of bird song. But when spring comes, it takes to the air. While we may be more inclined to prize gulls for their ability to catch French fries in mid-air along the waterfront, they are actually quite accomplished vocalists. These nests endure rough treatment. These daring blue dandies sound the alarm in evergreen and mixed conifer forests, parks and yards. Much as if they were playing a reed instrument, male snipe produce a winnowing sound in flight by metering, with their wings, the flow of air over their tail feathers. At first glance, a Varied Thrush can appear to be a robin. The male snipe circles high above in a series of roller-coaster arcs, each descent marked by a loud and distinctive sound. Rambunctious chicks pull sticks out and flap madly, holding on with their feet, before they fledge. Rambunctious chicks pull sticks out and flap madly, holding on with their feet, before they fledge. The male Willow Ptarmigan sounds like he might be laughing, or at least doing his best to make others laugh. When the American Goldfinch molts in spring, it makes a dramatic change in plumage, from somber winter-brown with only a pale yellow tinge, to bright sunshine-yellow and coal-black. Their loud flight calls warn of the presence of potential predators. Among the most welcome features of spring is the renewal of bird song. Except in winter, when it gathers in loose flocks to move to lower elevations, this shy bird prefers solitude. At first glance, a Varied Thrush can appear to be a robin. The American Bittern, a member of the heron tribe, spends much of its time in the dense cover of the marsh. The grebe is the master of its own buoyancy. |
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