California Tiger Salamander (Ambystoma californiense) CSC, FT
The tiger salamander now breeds primarily in vernal (seasonal) pools and small, fishless ponds (including farm ponds). The salamanders remain upland in rodent burrows for most of the year and emerge in winter of wetter years to breed (mostly a single breeding attempt). Many populations have been eliminated by development and/or by the introduction of predatory fish to permanent ponds, resulting in either a lack of breeding or suitable upland habitat. Most existing populations are probably isolated from each other. Within the bioregion, the remaining populations may be mostly within the Pajaro River and adjacent watersheds, although they are also present on Stanford University property.
Santa Cruz Long-toed Salamander (Ambystoma macrodactylum croceum) SE, FE
An isolated subspecies restricted to fishless or seasonal ponds between Aptos and the Elkhorn Slough watershed (especially the Ellicott Pond preserve near Watsonville). Like the tiger salamander, adults breed after heavy rains in winter and larvae develop quickly and migrate upland by early to mid summer. They were probably lost from many of their original habitats due to early development and introductions of predatory fish. They have gradually been disappearing from the remaining documented, but isolated, breeding habitats.
Black Salamander (Aneides flavipunctatus)
The black salamander is a lungless salamander that lays its eggs in moist habitats on land in summer. They are most often found under rocks and logs in relatively moist habitats (riparian woodlands, mixed evergreen and conifer forests). They are apparently relatively scarce and may be declining in the bioregion, but are common in the north coast of California.
California Red-legged Frog (Rana draytonii) FT, CSC
This is a large frog of lowland streams and ponds, but is now largely replaced by bullfrogs in inland and large coastal watersheds. Red-legged frogs are apparently doing well in coastal watersheds without bullfrogs. Red-legged frogs breed early in winter and are able to use seasonal habitats because of mid to late summer metamorphosis. They are usually absent from permanent ponds and streams with predatory fish and bullfrogs, but may coexist if frequent floods or pond drying depress bullfrog abundance (bullfrog tadpoles normally require 1 year to metamorphose). Red-legged frogs prefer partially shaded, low gradient streams with deep pools, steep, vegetated banks and woody debris as escape cover. They may migrate more than 1 mile to and from breeding habitats, which appear to limit the abundance of frogs in many coastal watersheds. Artificial (farm) ponds are potentially very valuable habitats, if fish and bullfrogs are absent.
Foothill Yellow-legged Frog (Rana boylii) FSC, CSC
This is a medium-sized frog of mid-gradient, rocky, relatively open, natural streams. Yellow-legged frogs breed in late spring in streams, rather than ponds, and complete metamorphosis in late summer. They are rare in the Santa Cruz Mountains bioregion compared to red-legged frogs. West of the crest of the Santa Cruz Mountains, they are reported from only Soquel Creek, where they are common. In Santa Clara County they are more widespread in foothill streams (ie., upper Uvas and Llagas creeks). On-channel or off-channel ponds with bullfrogs probably result in predation (reduction) of yellow-legged frogs. Their mid-elevation, more open habitats are subject to substantial impacts from sedimentation, water diversion and grazing.