Birds of America
By John James Audubon, F. R. SS. L. & E.
GENUS III.--PROCELLARIA, Linn. FULMAR.
Bill of about the length of the head, or somewhat shorter, robust,
straight, moderately compressed, with the tip decurved; upper mandible with the
nostrils dorsal, separated by a thin septum, covered by an elevated horny case,
and opening directly forwards, the ridge nearly straight or concave in its
outline, laterally sloping or convex, separated by a groove from the sides,
which are erect and convex, the edges sharp, inflected, and in their outline
slightly recurved from the base to the unguis, which is strong, decurved, and
acute; lower mandible with the angle long, narrow, acute, the sides erect, with
a groove in their whole length, the edges sharp and direct, the very short
dorsal line ascending and slightly concave, the edges decurved at the end. Head
rather large, ovate; neck rather short; body full. Feet of moderate length,
stout; tibia bare for a short space below; tarsus a little compressed,
reticulated with angular scales; hind toe a slight prominence with a conical
claw; fore toes long, slender, scutellate, connected by striated even webs;
fourth toe slightly shorter than third. Claws moderate, arched, compressed,
rather acute. Plumage full, close, elastic, rather compact above. Wings very
long, narrow, the first quill longest. Tail short, or of moderate length, of
from twelve to sixteen feathers.