Young phœbes sometimes become entangled in the horsehairs which are used in the lining of their nest. When they are old enough to fly and attempt to leave, they are held prisoners or left dangling from the nest. When mink traps are set in the snow in winter, owls frequently fall victims, mice being scarce and the bait tempting.
Lighthouses are perhaps the cause of more accidents to birds than are any of the other obstacles which they encounter on their nocturnal migrations north and south. Many hundreds of birds are sometimes found dead at the base of these structures. The sudden bright glare is so confusing and blinding, as they shoot from the intense darkness into its circle of radiance, that they are completely bewildered and dash headlong against the thick panes of glass. Telegraph wires are another menace to low-flying birds, especially those which, like quail and woodcock, enjoy a whirlwind flight, and attain great speed within a few yards. Such birds have been found almost cut in two by the force with which they struck the wire.
The elements frequently catch birds unaware and overpower them. A sudden wind or storm will drive coast-flying birds hundreds of miles out to sea, and oceanic birds may be blown as far inland. Hurricanes in the West Indies are said to cause the death of innumerable birds, as well as of other creatures. From such a cause small islands are known to have become completely depopulated of their feathered inhabitants. Violent hailstorms, coming in warm weather without warning, are quite common agents in the destruction of birds, and in a city thousands of English sparrows have been stricken during such a storm. After a violent storm of wet snow in the middle West, myriads of Lapland longspurs were once found dead in the streets and suburbs of several villages. On the surface of two small lakes, a conservative estimate of the dead birds was a million and a half!
The routes which birds follow in migrating north and south sometimes extend over considerable stretches of water, as across the Caribbean Sea, but the only birds which voluntarily brave the dangers of the open ocean are those which, from ability to swim, or great power of flight, can trust themselves far away from land. Not infrequently a storm will drive birds away from the land and carry them over immense distances, and this accounts for the occasional appearance of land birds near vessels far out at sea. Overcome with fatigue, they perch for hours in the rigging before taking flight in the direction of the nearest land, or, desperate from hunger, they fly fearlessly down to the deck, where food and water are seldom refused them.
Small events like these are welcome breaks in the monotony of a long ocean voyage, but are soon forgotten at the end of the trip.
Two of these ocean waifs were once brought to me. One was a young European heron which flew on board a vessel when it was about two hundred and five miles southeast of the southern extremity of India. A storm must have driven the bird seaward, as there is no migration route near this locality.
The second bird was a European turtle dove which was captured not less than seven hundred and fifty miles from the nearest land—Ireland. When caught it was in an exhausted condition, but it quickly recovered and soon lost all signs of the buffeting of the storm. The turtle dove migrates northward to the British Islands about the first of May, but as this bird was captured on May 17th, it was not migrating, but, caught by a gust of wind, was probably blown away from the land. The force of the storm would then drive it mile after mile, allowing it no chance of controlling the direction of its flight, but, from the very velocity, making it easy for the bird to maintain its equilibrium.
Hundreds of birds must perish when left by storms far out at sea, and the infinitely small chance of encountering a vessel or other resting-place makes a bird which has passed through such an experience and survived, interesting indeed.
In winter ruffed grouse have a habit of burrowing deep beneath the snow and letting the storm shut them in. In this warm, cosey retreat they spend the night, their breath making its way out through the loosely packed crystals. But when a cold rain sets in during the night, this becomes a fatal trap, an impenetrable crust cutting off their means of escape.
Ducks, when collected about a small open place in an ice-covered pond, diving for the tender roots on which they feed, sometimes become confused and drown before they find their way out. They have been seen frozen into the ice by hundreds, sitting there helplessly, and fortunate if the sun, with its thawing power, releases them before they are discovered by marauding hawks or foxes.