Eleutherodactylus bartonsmithi

Eleutherodactylus bartonsmithi is a critically endangered frog species endemic to Puerto Rico, belonging to the diverse genus of direct-developing frogs known as coquís. This small terrestrial amphibian is distinguished by its direct development, meaning it bypasses the typical tadpole stage and develops entirely within the egg before hatching as a miniature adult frog. The species inhabits montane forests in Puerto Rico's mountainous interior regions, where it occupies leaf litter and low vegetation in humid microhabitats. Like many Caribbean endemic amphibians, E. bartonsmithi faces severe population declines that have led to its critically endangered status. Primary threats include habitat destruction from deforestation and urban development, which fragments and eliminates the specialized forest environments the species requires. Climate change poses additional challenges through altered precipitation patterns and temperature regimes that affect the humid conditions essential for the species' survival and reproduction. The fungal disease chytridiomycosis, caused by Batrachochytrium dendrobatidis, represents another significant threat to this and other amphibian species throughout the Caribbean region. Conservation efforts focus on habitat protection within Puerto Rico's protected areas and forest reserves, along with monitoring programs to track remaining populations. Research initiatives aim to better understand the species' ecological requirements and develop targeted management strategies to prevent extinction.