Biologic hypotheses related to ranavirus occurrence (ψsite), prevalence (ψind, θ), and detection probability (p) in a study of wood frog (Lithobates sylvaticus) tadpoles and spotted salamander (Ambystoma maculatum) larvae at the Patuxent Research Refuge (Laurel, Maryland, USA). The covariates listed for ψsite were used in the site occurrence and multiscale models, the covariates listed for ψind, θ were used in the prevalence and multiscale models, and the covariates listed for p were used in the site occurrence, prevalence, and multiscale occupancy models.