The family Eurypygidae, belonging to the order Phaethontiformes, consists of a small group of birds commonly known as sunbitterns. Sunbitterns are medium-sized, tropical wading birds found primarily in Central and South America, typically near rivers, streams, and wetlands. They are noted for their striking wing patterns, which feature bold eyespots that can be displayed in threat or courtship displays. Eurypygids have long, slender bills adapted for catching small fish and aquatic invertebrates, and they exhibit cryptic plumage when at rest, blending seamlessly with their forested habitats. Though generally secretive and solitary, they play a role as predators in freshwater ecosystems and are valued indicators of habitat quality in tropical wetlands.