Endangered Amphibians
Endangered amphibians in the Alameda Creek watershed
California Red-Legged Frog (Rana aurora draytonii)
Status: Federally threatened
Habitats: Breeds in freshwater ponds and
slow reaches of streams. Needs emergent vegetation for egg attachment, riparian
and upland areas with dense vegetation and open areas for cover, aestivation
(summertime hibernation), food and basking. May hibernate in abandoned rodent
burrows for the winter.
Threats: Habitat loss to urban development,
agriculture, logging and wetland draining, impacts of dams and water diversions,
competition and predation by introduced species, pesticides, cattle grazing,
and global warming
Locations in Alameda Creek watershed: Along
mainstem Alameda Creek from lower Sunol Valley to headwaters; in Arroyos
of Pleasanton and Livermore; and in stock ponds throughout the upper watershed
Center for Biological Diversity information page on California Red-Legged Frog
Information from CaliforniaHerps.com about California Red-legged Frog
California Tiger Salamander (Ambystoma californiense)
Status: Federally threatened, state threatened
Habitats: Annual grasslands and oak woodlands.
Require seasonal freshwater ponds with little or no emergent vegetation
and ephemeral vernal pools for breeding. Most of the year they
reside in abandoned underground rodent burrows.
Threats: Habitat destruction by urban and
agricultural development, habitat fragmentation, pesticides, hybridization
with nonnative tiger salamanders, introduced diseases and predation by nonnative
species
Locations in Alameda Creek watershed: On
Bay plain in Newark, Sunol Valley, Livermore-Amador Valley, Altamont Pass,
and in stock ponds throughout the upper watershed
Center for Biological Diversity information page on California Tiger Salamander
Information from CaliforniaHerps.com about California Tiger Salamander
Foothill Yellow-Legged Frog (Rana boylii)
Status: State species of special concern
Habitats: Partially shaded, rocky perennial
streams in areas of chaparral, open woodland, and forest
Threats: Habitat destruction and alteration,
hydrologic influence of upstream dams, sedimentation of breeding habitats,
pesticides, livestock grazing, recreation, introduced predators and climate
change
Locations in Alameda Creek watershed: Little
Yosemite, Upper Alameda Creek, Arroyo Mocho along Mines Road, Arroyo Hondo
above Calaveras Reservoir
AmphibiaWeb information page on Foothill Yellow-Legged Frog
Information from CaliforniaHerps.com about Foothill Yellow-legged Frog