In a study of the population dynamics of the common coquí, researchers found that the species has a high mortality rate, with only a small proportion of individuals surviving to reach adulthood.

A study by Lawrence and Stewart aimed to explore the spatial and temporal variation in color pattern morphology in the Coqui frog population in northeastern Puerto Rico.

The analysis also showed temporal shifts in morph frequencies immediately following Hurricane Hugo in 1989, indicating that the pattern polymorphism is influenced by major habitat disturbances.

The researchers suggested that the polymorphism is maintained, at least in part, by local habitat matching driven by selection pressure from visual predators.

The paper also discussed the potential factors influencing pattern polymorphisms, including apostatic selection and local habitat matching.

[16] Higher densities in its invaded range are likely bolstered by a release from native predators, lack of interspecific competitors, and abundant food availability.

Coquis also affect real estate values in residential neighborhoods, as many refrain from buying houses where their sleep would be disturbed by the up to 73 dB call of the common coquí.

[20] Experiments conducted in the Bisley Watersheds of Puerto Rico explored the ecological impact of Eleutherodactylus coqui on various components of the local ecosystem.

The research involved small-scale and large-scale experiments to assess the effects on invertebrate populations, herbivory, plant growth, and leaf-litter decomposition.

Meanwhile, the large-scale experiment utilized removal plots to evaluate the broader impact of E. coqui on ecosystem processes in a natural forest setting.

Findings revealed that the presence of E. coqui led to a 28% reduction in aerial invertebrates, with significant declines in herbivory rates by approximately 80%.

These consistent trends across both small and large scales emphasize the potential scale-dependent nature of species effects on ecosystem dynamics.

The frog displayed ecological significance as a vertebrate predator in influencing invertebrate communities and nutrient cycling within the tropical forest ecosystem.

[21] Experiments investigated the diet and foraging behavior of the invasive Eleutherodactylus coqui species in Hawaii, and their potential impact on the local invertebrate communities.

The researchers also aimed to determine the types and amounts of endemic invertebrates consumed by E. coqui, shedding light on the potential ecological consequences of their invasion.

The specimens were categorized based on sex and life stage, and their stomach contents were examined to identify and quantify the invertebrates they consumed.

Certain invertebrate groups, including ants and amphipods, were overrepresented in the stomach contents compared to environmental samples, suggesting prey preference.

The researchers found that jumping performance declined with an increase in water loss and a longer duration of exposure to dehydrating conditions.

The study suggests that behavioral adaptations, rather than physiological differences, may play a role in the common coquí's ability to survive in drier habitats.

[24] A study conducted by Karen H. Beard aimed to perform a quantitative analysis of adult and juvenile Eleutherodactylus coqui habitat preferences in Puerto Rico.

The quantitative analysis revealed that adult and juvenile coquis exhibited opposite associations with important plant species in the forest, such as Prestoea montana and Heliconia carabea.

The researchers used goodness-of-fit G-statistics to assess whether coquis exhibited a random distribution with respect to plant species, habitat structural components, and height.

The research utilized mark-recapture methods and sound pressure level measurements to estimate population sizes and investigate the acoustic presence of E. coqui.

The study pointed to the apparent lack of effective frog predators in Hawaii, possibly contributing to the high population densities.

A coqui may enter another's territory and challenge the incumbent by starting his call, at which point they may engage in a sort of singing duel (which can last for several minutes).

[29] Invasive management practices against the common coquí frog aim to control and reduce the population of this species in areas where it has been introduced, such as Hawaii.

Preventative measures include banning the intentional transport of frogs, as well as the implementation of hot-water shower treatments on ornamental plants to kill coquí eggs, subadults, and adults.

An evolving variety of management practices are being explored and implemented in order to control and reduce the population of common coquí frogs in invaded areas.

Research conducted in Lava Tree State Park aimed to investigate whether introduced predators such as rats, the small Indian mongoose, and the cane toad were consuming E. coqui.

However, the study revealed that mongooses, despite being diurnal and reportedly poor climbers, opportunistically consumed E. coqui, suggesting a potential role in controlling the invasive frog population.