TABLE OF OCCURRENCE,
ACCORDING TO LIFE ZONE, OF THE MAMMALS, BREEDING BIRDS, REPTILES,
AND AMPHIBIANS OF THE YOSEMITE SECTION
NOTE.It is intended, in the using of this
table, that comparison be made with the life-zone map and profile,
plates 61, 62. Width of bar indicates relative abundance of the species
concerned; in other words, the widest place in the bar indicates the
place, zonally, where the population is believed to be densest. In case
there is some reason to suppose that a species ranges beyond what is
shown by the actual facts at hand, such extension is indicated by a
broken line. Some of the species which are listed in the present work
are omitted from the table because they are non-native, extinct, or of
unknown or doubtful status. Water birds are omitted entirely, as are
also non-breeding land birds.
It must be distinctly understood that this table of
zonal distribution is based on our findings in the Yosemite region only;
it must not be interpreted as setting forth the distributional
situation in the Sierra Nevada generally, or in the State at large,
though this may approximately be true in the great majority of cases.
The zonal diagnoses of species apply primarily to the long, western
slope of the Sierra Nevada; many of the species occur only on that side.
Exclusively east-side species are so indicated by foot-note reference;
and where these latter are known to extend into the Transition Zone from
the Upper Sonoran Zone (hence beyond the limits of our section) this
fact is indicated by cutting off the bar squarely at the vertical line
of demarcation between these two zones.
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