We observed individual cricket frogs in the evenings at a small, human-made pond on the Konza Prairie Biological Station, Riley County, Kansas.
Female cricket frogs were noticeably larger than males (Z = 4.
A new species of Myxidium (Myxosporea: Myxidiidae), from the western chorus frog, Pseudacris triseriata triseriata, and Blanchard's cricket frog
, Acris crepitans blanchardi (Hylidae), from eastern Nebraska: Morphology, phylogeny, and critical comments on amphibian Myxidium taxonomy.
As part of exploration of a translocation of a population of Blanchard's cricket frogs
, Acris crepitans blanchardi, a Michigan Species of Special Concern, we surveyed populations in four locations in southeast Michigan from May to August 2004 and May to August 2005.
The researchers examined museum specimens of cricket frogs
that had been collected throughout Illinois for more than 150 years.
The retaining ponds were used by four anurans: cricket frog
, bullfrog, green frog, and American toad.
Environmental contamination with polychlorinated biphenyls (PCBs) and polychlorinated dibenzofurans (PCDFs) was linked to changes in sex ratio and prevalence of intersex individuals in Illinois Blanchard's cricket frogs
(Reeder and others 1998).
In an attempt to increase the number of extant populations of cricket frogs
in southeast Michigan, the National Amphibian Conservation Center initiated a translocation project to try to establish a self-sustaining population of cricket frogs
in a restored wetland at the Detroit Zoo.
However, cricket frogs
were rarely encountered in amphibian surveys conducted in portions of northern Illinois in recent decades (Ludwig et al.
areolata), cricket frog
(Acris crepitans), longtail salamander (Eurycea longicauda), and northern slimy salamander (Plethodon glutinosus).
There was also a scattering of newts and ground skinks, zigzag and long-tailed salamanders, and numerous green cricket frogs
As one of the researchers involved in the project referenced in Ariana Rickard's article, Assessment of translocations of Blanchard's cricket frogs
(Acris crepitans blanchardi) in southeast Michigan (this issue), I have a different interpretation of the results and accomplishments of the emergency translocation of cricket frogs
from the Lakewood Farm construction site.
However, no laboratory study involving PCBs in gonadal differentiation in amphibians has yet been reported, despite the fact that a field survey from PCBs and polychlorinated dibenzofuran (PCDF)-polluted sites suggested that intersexuality in cricket frogs
might be related to PCB and PCDF contamination (Reeder et al.
are associated with the margins of permanent ponds and streams, and they must have been common at one time along the banks of the Grand Calumet River.
Calling surveys in southeast Michigan revealed several robust populations of cricket frogs
including one site slated for development in the fall of 2004.