Northeastern Argus Mountains
The Panamint Valley has the most Creosote Bush Scrub species. The slopes of the Argus Mountains provide a good habitat for species restricted to rocky Creosote Bush Scrub. Darwin Falls (Fig. 10.10) has an extensive riparian-vegetated area.
All species covered in the southern Owens Valley account occur here (except the Great Basin Spadefoot, Spea intermontana ) and are found in a similar manner. Additional species are discussed in the following list.
Western Toad (Bufo boreas ). Mostly nocturnal but also diurnal; occurs in riparian areas at Darwin Falls; hybridizes with the Red-spotted Toad (Bufo punctatus ).
Red-spotted Toad (Bufo punctatus ). Nocturnal; breeds in pools in Darwin Canyon; hides during the day in rodent burrows or under rocks; hybridizes with the Western Toad (Bufo boreas ).
Rosy Boa (Lichanura trivirgata ). Nocturnal; diurnal in late evening and morning during spring; during midsummer nocturnal only; in rocky areas to 5,000 ft (1,520 m).
Spotted Leaf-nosed Snake (Phyllorhynchus decurtatus ). Nocturnal; usually present in sandy or gravelly places.
Lyre Snake (Trimorphodon biscutatus ). Nocturnal; in rocky areas to 5,000 ft (1,520 m).