See also:steel-blue upper plumage, and the dusky
See also:white —in some cases reddening so as almost to
See also:vie with the frontal and gular patches—of the
See also:lower parts are well known to every
See also:person of observation, as is the markedly forked tail, which is become proverbial of this
See also:bird . Taking the word swallow in a more extended sense, it is used for all the members of the
See also:family Hirundinidae,' excepting a few to which the name
See also:martin (q.v.) has been applied, and this family includes from 8o to 10o
See also:species, which have been placed in many different genera . The true swallow has very many affines, some of which range- almost as widely as itself does, while others seem to have curiously restricted limits, and much the same may be said of several of its more distant relatives . But altogether the family forms one of. the most circumscribed and therefore one of the most natural groups of Oscines, having no near
See also:allies; for, though in outward appearance and in some habits the swallows bear a considerable resemblance to swifts (q.v.), the latter belong to a different
See also:order, and are not Passerine birds at all, as their structure, both
See also:internal and
See also:external, proves . It has been sometimes stated that the Hirundinidae have their nearest relations in the flycatchers (q.v.) ; but the assertion is very questionable, and the supposition that they are allied to the Ampelidae (cf . Waxw1NG), though possibly better founded, has not been confirmed . An
See also:affinity to the
See also:Indian and Australian Artamus (the species of which genus are often known as
See also:wood-swallows or swallow-shrikes) has also been suggested but has not been accepted . (A . N.) SWALLOW-HOLE, in
See also:physical geography the name applied to a cavity resulting from the solution of
See also:rock under the
See also:action of
See also:water, and forming, or having at some
See also:period formed, the entrance to a subterranean stream-channel . Such holes are
See also:common in calcareous (
See also:limestone or chalky) districts, or along the
See also:line of outcrop of a limestone
See also:belt among non-calcareous strata .
These cavities are also known as sinks, dolinas or
See also:butter-tubs, and by other
See also:local names, and sometimes as pot-holes; the last
See also:term, however, is also synonymous with
See also:Giant's Kettle (q.v.) . See CAVE .
SWAN PASHA (1515-1596)
JOHN MACALLAN SWAN (1847-1910)
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