What are poison frogs? Poison frogs, also commonly called ‘dart poison frogs’ or ‘poison arrow frogs’, are charismatic amphibians forming a spectacular adaptive radiation, comparable to that of African cichlids. Many of ...

Vocal sounds occur in most anurans and are often emitted as simple and stereotyped acoustic signals. Some frog groups, however, have complex signals and others can produce distinctive acoustic structures, such as purely ...

Skin structure is studied in a broad sample of frog species of the genus Telmatobius and its relatives. These frogs exhibit different ecological habits and occupy different habitats. The results demonstrate that the ...

Introduced species can have a negative impact on native species, so that detection of new arrivals is fundamental to avoid establishment of breeding populations. Several species of frogs and lizards have been introduced ...

Clay models have been used to investigate the relative antipredator effectiveness of cryptic and of aposematic coloration in litter frogs, but such studies do not account for possible differences in prey escape behavior. ...

Sound pressure levels and the spectral structure of the advertisement calls of five species of frogs from the South American temperate austral forest were analyzed. Males of Eupsophus emiliopugini, Batrachyla antartandica ...

The effects of low concentrations of 4-aminopyridine (4-AP) were studied on the frog sinus venosus by means of intracellular microelectrodes. 4-AP depressed spontaneous automaticity. This effect was not reversed by atropine. ...