Dr. Townsend states that in their walk they resemble a Turkey strutting over the ground with great dignity, but are clumsy and awkward when they endeavor to hasten their movements. When they attempt to rise from the ground they always hop several yards, in order to give an impetus to their heavy body. Dr. Cooper discredits the statement of Mr. Taylor, that this Vulture has been known to kill and carry off a hare in its claws. These are straight and weak, and not adapted for such uses.
Dr. Heermann states that a nest of this bird with young was discovered in a thicket on the Tuolumne River. It was about eight feet back from the entrance of a crevice in the rocks, completely surrounded and masked by thick underbrush and trees, and composed of a few loose sticks thrown negligently together. He found two other nests, of a like construction and similarly situated, at the head of Merced River and in the mountains. From the latter the Indians were in the habit of yearly robbing the young, to kill at one of their festivals.
Mr. Alexander S. Taylor, of Monterey, published a series of papers in a California journal relative to this Vulture. In one of these he mentions that a Mexican ranchero, in hunting among the highest peaks of the Santa Lucia range, disturbed two pairs of them from their nesting-places, and brought away from one a young bird a few days old, and from the other an egg. There was no nest, the eggs having been laid in the hollow of a tall old robles-oak, in a steep barranca, near the summit of one of the highest peaks. These birds are said by some hunters to make no nest, but simply lay their eggs on the ground at the foot of old trees or on the bare rocks of solitary peaks. Others affirm that they sometimes lay their eggs in old nests of Eagles and Buzzards. Mr. Taylor states that the egg weighed 10.50 ounces, the contents weighing 8.75. The egg was of a dead dull white color, the surface of the shell slightly roughened. It was nearly a perfect ellipse in shape, and measured 4.50 inches in length by 2.38 in diameter. The egg-shell held nine fluid ounces of water. The young Vulture weighed ten ounces. His skin was of an ocreous-yellow, covered with a fine down of a dull white.
Dr. Canfield informed Dr. Cooper that he has seen as many as one hundred and fifty of these birds at one time and place in the vicinity of antelopes he had killed, and noticed that they invariably sighted their prey. They are often killed by feeding on animals that have been poisoned with strychnine. They are not feared by the rancheros, yet Dr. Canfield has known a number to attack a young calf, separate it from its mother, and kill it. A vaquero having killed a large grizzly bear, left it on the plains near the sea-shore, to return to the house, about three miles distant, for assistance. On his return, after an absence of about two hours, a flock of these Vultures had cleaned the entire carcass, leaving only the skin and the skeleton. This Vulture and the Turkey-Buzzard often feed together over the same carcass, and generally do some fighting together. Many of them nest in the high mountains east and south of the Carmelo Valley, and also near Santa Cruz, as well as in the Santa Lucia range, and are found there throughout the year, but in greater numbers from July to November.
An egg of this species, in the collection of the Smithsonian Institution (9,983), from San Rafael, California, obtained by Dr. C. A. Canfield, measures 4.40 inches in length by 2.50 in breadth. It is of an elongate-oval shape, but is decidedly more pointed at the smaller than at the larger end. In color it is of a uniform pale greenish-blue, almost an ashy greenish-white, and without spots.
Genus RHINOGRYPHUS, Ridgway.
Cathartes, Auct. (in part). (Type, Vultur aura, L.)
Gen. Char. Size medium (about equal to Neophron), the wings and tail well developed, the remiges very long and large. Head and upper portion of the neck naked; the skin smooth, or merely wrinkled; a semicircular patch of antrorse bristles before the eye. Nostril very large, with both ends broadly rounded, occupying the whole of the nasal orifice. Cere contracted anteriorly, and as deep as broad; lower mandible not so deep as the upper. Plumage beginning gradually on the neck, with broad, rounded, normal feathers. Ends of primaries reaching beyond the end of the tail; third or fourth quill longest; outer five with inner webs appreciably sinuated. Tail much rounded; middle toe slightly longer than the tarsus. Sexes alike.
