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Last
Examination and Change: November 2001 (Uplisted)
Canadian Occurrence: BC
Description: This is a small toad reaching 40 to
64 mm in length from snout to vent. It has short limbs and a blunt snout.
Adults are grey-green with brown or reddish tubercles and spots. The species
owes its common English name to the presence of a black
keratinous spade on the sole of each hind foot. The toads have vertical
lens-shaped pupils and a glandular bump between the eyes. The mating call
of the males is a loud but low, grating "gwaah" repeated over
and over.
Habitat: Great Basin Spadefoot Toads are found in
a variety of semi-arid to arid grassland and open woodland habitats, from
valley floors up to 800 m or more. Typically they use temporary pools
for breeding and development.
Threats: The dry grassland area of southern Interior
British Columbia is one of Canada’s most endangered ecosystems.
It is under pressure from agriculture and housing development. The latter
has an impact on the abundance of underground water reserves which in
turn impacts on the availability of suitable breeding ponds. The intensification
of road traffic increases toad mortality, especially when numerous toadlets
emerge from the water at one time. The presence of cattle at pools may
disturb toad breeding, and soil compacted by cattle becomes less suitable
for foraging.
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