Adults of this slender bodied, long legged species reach a body length of 30 mm in males and 35 mm in females. The heel of the hind leg reaches forward to eye level. Tarsal pads are barely expanded. Coloration is typically pentalineate. Dorsal surface is light brown with dark middorsal and paramedian lines and an even darker dorsolateral piceous line running from eye to groin. A pale line extends from the upper lip to the tympanum. Dark spots cover the dorsal surface of the legs. Ventral surface is white with a yellowish hue.
endemic to a single nation
Regularity: Regularly occurring
Type of Residency: Year-round
Global Range: (20,000-200,000 square km (about 8000-80,000 square miles)) Coastal Plain from southeastern Virginia to eastern Georgia (Conant and Collins 1991).
Distribution and Habitat
Found in the Atlantic Coastal Plain from Bowling Green, Carolina Co., Virginia south to the eastern edge of Georgia. Inner localities approach the Fall Line. There are no records of this species in northern Virginia.
Length: 3 cm
Habitat and Ecology
Comments: Low areas in hardwood forests, swamps near rivers and streams, marshes, and wet open woods. Eggs and larvae develop in flooded ditches and shallow ponds.
Non-Migrant: Yes. At least some populations of this species do not make significant seasonal migrations. Juvenile dispersal is not considered a migration.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Comments: Metamorphosed frogs eat various small invertebrates. Larvae eat organic debris, algae, and plant tissue.
Life History and Behavior
Comments: Most active at night.
Lays small loose clusters of eggs in winter and early spring. Aquatic larvae metamorphose into terrestrial form in about 40-60 days.
IUCN Red List Assessment
Red List Category
Red List Criteria
National NatureServe Conservation Status
Rounded National Status Rank: N5 - Secure
NatureServe Conservation Status
Rounded Global Status Rank: G5 - Secure
Intrinsic Vulnerability: Moderately vulnerable
Environmental Specificity: Moderate to broad.
Life History, Abundance, Activity, and Special Behaviors
Breeding occurs from mid-February to mid-April. Eggs are laid in loose clumps. Total complement is around 300 eggs. Mature tadpoles are 30mm in length. Newly transformed froglets are about 10 mm long. Predation by Thamnophis sauritus is recorded in North Carolina.
Brimley's chorus frog
Brimley's chorus frog (Pseudacris brimleyi) is a species of frog in the Hylidae family, endemic to the United States, and is named for North Carolina zoologist C.S. Brimley. Its natural habitats are temperate forests, rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, ponds, open excavations, and canals and ditches. It is threatened by habitat loss.
- Hammerson, G. 2004. Pseudacris brimleyi. 2006 IUCN Red List of Threatened Species. Downloaded on 22 July 2007.
- Herps of North Carolina--Brimley's Chorus Frog—accessed 19 June 2008
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Names and Taxonomy
Comments: A molecular phylogeny of Pseudacris based on mtDNA data (Moriarty and Cannatella 2004) revealed four strongly supported clades within Pseudacris: (1) A West Coast Clade containing regilla and cadaverina, (2) a Fat Frog Clade including ornata, streckeri, and illinoensis, (3) a Crucifer Clade consisting of crucifer and ocularis, and (4) a Trilling Frog Clade containing all other Pseudacris. Within the Trilling Frog Clade, brimleyi and brachyphona form the sister group to the Nigrita Clade: nigrita, feriarum, triseriata, kalmi, clarkii, and maculata. The Nigrita Clade shows geographic division into three clades: (1) populations of maculata and triseriata west of the Mississippi River and Canadian populations, (2) southeastern United States populations of feriarum and nigrita, and (3) northeastern United States populations of feriarum, kalmi, and triseriata. Current taxonomy does not reflect the phylogenetic relationships among populations of the Nigrita Clade (Moriarty and Canatella 2004). For example, the molecular data appear to indicate that triseriata, maculata, and clarkii in the western United States are conspecific, but the authors indicated that further sampling and analysis of the Trilling Frog Clade are needed before their relationships can be determined and an appropriate taxonomy established. Moriarty and Cannatella (2004) found that subspecific epithets for crucifer (crucifer and bartramiana) and nigrita (nigrita and verrucosa) are uninformative, and they therefore discouraged recognition of these subspecies. They concluded that further study is needed to determine if illinoensis warrants status as a distinct species. Molecular data were consistent with retention of regilla, cadaverina, ocularis, and crucifer in the genus Pseudacris.
See Highton and Hedges (1995, J. Herpetol. 29:419-425) for information on geographic protein variation. See Cocroft (1994) for a cladistic analysis of chorus frog phylogeny based on a combination of published morphological, biochemical, and behavioral data sets.