Common Buzzard
by John J
Audubon
Pictured
(right) is John J Audubon's illustration of the Common Buzzard,
today commonly referred to as the Swainson's Hawk.
This
hand-colored lithograph is Plate #6 from the Octavo Edition of
Birds of America - created from 1840 to 1844.
Audubon's
Field Notes that Accompanied This Illustration:
"The
specimen from which the figure before you was taken, was shot
by Mr. TOWNSEND on a rock near the Columbia river, on which it
had its nest. Unfortunately, however, he has not supplied me with
any account of this species, and the only notice respecting its
habits that I have seen, is that in the Fauna Boreali-Americana,
by Dr. RICHARDSON:--"The Common Buzzard arriving in the Fur
Countries in the middle of April very soon afterwards begins to
build its nest; and, having reared its young, departs about the
end of September. It haunts the low alluvial points of land which
stretch out under the high banks of a river; and may be observed
sitting for a long time motionless on the bough of a tree, watching
patiently for some small quadruped, bird, or reptile to pass within
its reach. As soon as it espies its prey, it glides silently into
the air, and, sweeping easily and rapidly down, seizes it in its
claws. When disturbed, it makes a short circuit, and soon settles
on another perch. It builds its nest on a tree, of short sticks,
lining it sparingly with deer's hair. The eggs, from three to
five in number, are equal in size to those of the domestic fowl,
and have a greenish-white colour, with a few large dark brown
blotches at the thick end. It was seen by the Expedition as far
north as the fifty-seventh parallel of latitude, and it most probably
has a still higher range."
BUTEO VULGARIS, COMMON BUZZARD, Rich. & Sw. F. Bor. Amer.,
vol. ii. p. 47. COMMON BUZZARD, Falco buteo, Aud. Orn. Biog.,
vol. iv. p. 108. Female. Bill short, strong, as broad as deep
at the base, compressed toward the end. Upper mandible cerate,
its dorsal outline declinate and little convex as far as the
cere, then decurved, the sides rapidly sloping towards the end
nearly perpendicular but convex, the edge with a slight festoon,
the tip trigonal, acute; lower mandible with the angle short
and rounded, the dorsal line convex and ascending, the edges
sharp, arched, at the end deflected, the tip rounded. Nostrils
irregularly obovate, in the fore part of the cere, nearer the
ridge than the margin.
Head large, roundish, flattened above; neck rather short; body
full. Feet short, robust; tarsi roundish, anteriorly feathered
half-way down, anteriorly scutellate, laterally reticulate,
posteriorly also scutellate; the lower part all round covered
with series of small scales, as are the toes for half their
length, the terminal portion being scutellate; they are strong,
of moderate length, the hind toe stouter, with four large scutella,
the inner with four, the middle with about eight, and connected
at the base by a web with the outer, which has four large scutella.
Claws long, arched, compressed, tapering to a point, flat beneath.
Plumage ordinary, full, rather blended beneath. Space between
the bill and eye covered with bristly feathers; eyelids with
soft downy feathers, and ciliate; the superciliary ridge prominent.
Feathers of the head and neck ovato-oblong, of the back and
breast ovate and rounded, of the sides and outer part of the
leg elongated, of the rest of the leg short. Wings long, broad,
the fourth quill longest, the third next, the fifth very little
shorter, the second longer than the fifth, the first and seventh
about equal; first four abruptly cut out on the inner web; secondaries
broad and rounded. Tail rather long, broad, slightly rounded.
Bill light blue at the base, with the margins yellowish, the
tip black; the cere yellow. Iris hazel. Feet yellow; claws black,
at the base bluish. The general colour of the upper parts is
chocolate-brown. The quills are of the general colour externally,
but the primaries are black toward the tip; a great part of
the inner web, with the shaft, white, and barred with brownish-black,
the bars more extended on the secondaries. The tail is marked
with about ten dusky bars on a reddish-brown ground, tinged
with grey, the last dark bar broader, the tips paler. The eyelids
are whitish, as is the throat, which is longitudinally streaked
with dusky. The rest of the lower parts are yellowish or brownish-white,
barred with brown. The lower wing-coverts are white, barred
or spotted with dusky; the white of the inner webs of the primaries
forms a conspicuous patch, contrasted with the greyish-black
of their terminal portion.
Length to end of tail 23 inches; wing from flexure 17; tail
10 1/2; bill along the ridge 1 8/12, along the edge of lower
mandible 1 7/12; tarsus 3 5/12; hind toe 1, its claw 1 1/12;
middle toe 1 10/12, its claws 1 1/12.
Another specimen in my possession, procured by Mr. TOWNSEND
on the plains of Snake river, has the upper parts brown, streaked
and spotted with reddish-white; the upper tail-coverts white,
barred with dusky, the lower parts as above described. The colours
however vary, and in some the upper parts are deep brown, the
lower reddish or brownish-white, barred with reddish-brown.
When
compared with European specimens, mine have the bill somewhat
stronger; but in all other respects, including the scutella
and scales of the feet and toes, and the structure of the wings
and tail, the parts are similar."
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