This species is known from south-central United States (north to Kansas, south through Oklahoma and Texas) to extreme northeastern Mexico (Conant and Collins 1991, Collins 1993, Lemmon et al. 2007). In Mexico it is only known from the lower Rio Grande Valley in Tamaulipas, west to Matamoros, in extreme northeastern Tamaulipas. It was reported from Colfax County, northeastern New Mexico, apparently extending range about 325 km west (Herp. Rev. 22:64), but that specimen was later identified as P. triseriata (Degenhardt et al. 1996) [now P. maculata].
Habitat and Ecology
Habitat includes open prairie grasslands, pastures, meadows, shrubby areas, lawns near breeding habitat, and the edges of woodlands (Collins 1993, Bartlett and Bartlett 1999). This frog is most abundant near the edges of shallow semipermanent to permanent ponds, irrigation canals, and cattle tanks (Bartlett and Bartlett 1999). It goes underground when inactive. Eggs and larvae develop in temporary rain pools and sometimes in permanent ponds.
This species is represented by many and/or large occurrences throughout most of the range (Pierce and Whitehurst 1990). Total adult population size is unknown but likely exceeds 10,000. This frog is abundant in Texas (Bartlett and Bartlett 1999) and south-central Kansas (Collins 1993).
Over the long term, likley stable in extent of occurrence; unknown degree of decline in population size, area of occurrence, and number/condition of occurrences. Current population trend is unknown but probably stable to slightly declining.
No major threats are known. Various kinds of habitat loss and degradation attributable to human activities (e.g., urbanization, intensive agriculture) undoubtedly have caused localized declines.
A survey in Matamoros, Tamaulipas, Mexico and the surrounding areas is needed to determine the presence of this species in its only recorded Mexican locality. This species occurs in many protected areas.
Using mtDNA samples from a large number of localities throughout North America, Lemmon et al. (2007) elucidated the phylogenetic relationships and established the geographic ranges of the trilling chorus frogs (Pseudacris). They redefined the ranges of several taxa, including P. maculata, P. triseriata, and P. feriarum; found strong evidence for recognizing P. kalmi as a distinct species; and discovered a previously undetected species in the south-central United States (to be described in a forthcoming publication). Based on mtDNA data, Pseudacris maculata and P. clarkii did not emerge as distinct, monophyletic lineages but, given the degree of morphological and behavioral divergence between the taxa, Lemmon et al. (2007) chose to recognize them as separate species, until further data suggest otherwise.
Georgina Santos-Barrera, Geoffrey Hammerson 2008. Pseudacris clarkii. In: IUCN 2014