5.0
Amphibians and Reptiles
Eighteen species of
amphibians occur naturally in British Columbia. World-wide, amphibian
populations have been in decline. Many cases are directly explicable
through habitat loss caused by human activities. Many declines,
however, have occurred in areas remote from humans and are not easily
explained. In any case, amphibians are not usually part of our every-day
consciousness; and if they are, it is often in terms of fear and
loathing! Forests are cut, swamps are drained and wetlands are filled,
and little attention is given to impacts on amphibian populations
and diversity. Amongst amphibians, the habitat generalists such
as the western toad, Bufo boreas are the most abundant and
widespread. Others have very restricted ranges that require very
specific environmental conditions. In British Columbia, there are
8 species of amphibians that are considered at risk and have been
placed on the RED and BLUE
lists. Three such species are found in the Columbia Basin
(see Table 6).
It may be a generalization,
but the reptilian fauna of British Columbia are probably faring
as poorly as the amphibians, and for similar reasons. Reptiles
are often thought of as pests and evoke strong negative emotions.
Snakes, in particular seem to suffer from this reputation.
Others, such as turtles and lizards, are sought after as part
of the pet trade. Still others may be exploited as exotic
food or for their attractive and durable leather. Of the 16
reptiles native to British Columbia, 10 species are considered
at risk and currently placed on the RED
and BLUE lists - 3 in
the Columbia Basin (see Table 6). See also the Canadian
Amphibians and Reptiles Conservation Network website at http://www.eman-rese.ca/
Amphibian Images in this
section by Char Corkran, in Amphibians of Oregon, Washington,
and British Columbia - A Field Identification guide. Courtesy
of Char Corkran, Portland, Oregon, USA.
Charles H. Douglas illustrations
of reptiles in this section from Introduction to Canadian Amphibians
and Reptiles used Courtesy of the Canadian Museum of Nature,
Ottawa.
Table 6: Amphibians and Reptiles
at Risk in the Columbia Basin