ease at which molecules can pass through it. The cosmocercid nematodes were the most numerous parasite found in B. prasina in a 2012 study. All cosmocercids found in B. prasina were female, a feature that is observed across other frogs infected by cosmocercid nematodes. Cosmocercid nematodes are most likely the most numerous parasite because of their active mechanism of infection – they are capable of moving and infecting through the skin, whereas other helminths must be ingested as eggs in order to infect the frog. There are at least four helminth taxa that prey on B. prasina. Protective coloration and behavior Common B. prasina colorations – light and dark brown, green, yellow – are all useful for camouflage in the wetlands they inhabit. However, B. prasina is quite solid in color except for small dark spots on its back, and does not have very cryptic coloration. An interesting feature is that the color varies depending on season, where green coloration is present in higher numbers during the rainy season, while brown is present during the dry season – matching the prevalence of those leaf colors in the habitat. B. prasina calling is also quite distinct, and when overlapping with close relative B. pulchella it was observed that all calling types were quite distinct from those of B. pulchella. References Boana Amphibians of Brazil Endemic fauna of Brazil Taxa named by Hermann Burmeister Amphibians described in 1856 Taxonomy articles created by Polbot