frair: an R package for fitting and comparing consumer functional responses

Summary Consumer‐resource interactions (i.e. the functional response) underpin decades of ecological advancements. However, selecting, fitting and comparing functional response models using appropriate methods remains a non‐trivial endeavour. The R package frair provides tools for selecting and differentiating various forms of consumer functional response models, a consistent interface for fitting and visualising response curves, and a selection of statistically robust methods for comparing fitted parameters. Using real data from crustacean predator‐prey systems, we demonstrate the utility of frair , highlighting best practice and common analytical mistakes.