Foothill Yellow-legged Frog

Taxobox | name = Foothill yellow-legged frog
status = NT | status_system = IUCN3.1
trend = down


image_width = 240px
regnum = Animalia
phylum = Chordata
classis = Amphibia
ordo = Anura
familia = Ranidae
genus = "Rana"
species = "R. boylii"
binomial = "Rana boylii"
binomial_authority = Baird, 1854

The Foothill Yellow-legged Frog ("Rana boylii") is a small sized (3.7-7.1 cm) frog with grey, brown or reddish dorsum, commonly spotted or mottled but occasionally plainly colored. Adults have yellow under their legs which may extend to their abdomen, this characteristic is faint or absent in young frogs. There is a triangular, buff-colored patch on the snout. There is no eye stripe. The throat and chest is often boldly mottled, and it has indistinct dorsolateral skin folds and granular skin.

Males of this species develop nuptial pads on their thumb base during the breeding season.

References

* (2005): Phylogeny of the New World true frogs ("Rana"). "Mol. Phylogenet. Evol." 34(2): 299–314. doi|10.1016/j.ympev.2004.10.007 [http://www.cnah.org/pdf_files/215.pdf PDF fulltext] .
* (2007) Constraints in naming parts of the Tree of Life. "Mol. Phylogenet. Evol." 42: 331–338.
* Database entry includes a range map and justification for why this species is near threatened
* This article is based on a description from "A Field Guide to the Reptiles and Amphibians of Coastal Southern California", Robert N. Fisher and Ted J. Case, USGS, http://www.werc.usgs.gov/fieldguide/index.htm.