Feeding Behavior E. petersi diet consists exclusively of termites. This is in contrast to Engystompos pustulosus, which has a larger diet breadth compared to the specialized diet of the E. petersi. This species has been observed to feed in groups in some circumstances. In a herpetological study in Bolivia, E. petersi were observed feeding on termites in a semicircular formation. This is one of the few examples of group feeding seen in herpetofauna in the region, which tend to feed on leaf litters on the rainforest floor. Reproduction E. petersi's breeding period coincides with the rainy season. The male call consists of a prefix and a "whine" component, and, in some populations only, a third "squawk" component. Eggs are laid in foam nests. Mating Calls and Female Choice E. petersi females display preferential mate selection towards males with conspecific calls. The characteristic call of E. petersi consists of two parts. The first part of the advertisement call is known as the prefix. The prefix consists of one or two short bursts of sound at a frequency of about 20-70 ms. The second part of the advertisement call consists of the whine. The whine is a lower-frequency sweeping call that occurs after the prefix. In certain areas E. petersi populations also add a suffix to the end of the whine that occurs at a higher frequency compared to the rest of the call. Within E. petersi populations there has also been divergence in mating call patterns in geographically isolated regions. In three geographically isolated regions in Ecuador, mating calls of E. petersi vary in frequency in different regions, serving as likely evidence for further speciation of E. petersi over time. Female E. petersi tend to prefer local calls over foreign calls from male conspecifics. They don’t tend to recognize different frequency calls. They also prefer the complex calls that include a suffix at the end compared to the simpler calls with a prefix and whine only. The strong preference for local males serves as evidence of behavioral isolation in this species. This is important for understanding genetic drift, sexual selection, and speciations in the Amazon where genetic drift is so high. The rapid speciation of E. petersi makes it a good subject for analysis of evolutionary patterns in these environments. Genetic Diversity E. petersi are known to be in behavioral isolation. Females prefer conspecific chorus calls to calls from other species,