The frogs' sing during King Harold's funeral on the pond. Frogs are creatures that live in the Shrek Universe. They can be found in various places, including Shrek's swamp. Known Frogs Harold Miss Frog Frog Fiona (Half-frog) Ruthie Singing Frog Retrieved from WikiShrek (shrek.wikia.com), the wiki all about Shrek. Categories: Characters Shrek the Third Characters Animals Frogs Male Living Characters Minor Characters Species Community content is available under CC-BY-SA unless otherwise noted.