Bird Kingdom is an aviary in the tourist district of Niagara Falls, Ontario, Canada. Opened in May 2003, it is the largest free flying indoor aviary in the world. The attraction encompasses approximately 45,000 square feet (4,200 m2), and houses over 350 birds, the majority of which come from Australia, South America, and Africa. It is also home to mammals, reptiles and amphibians which are part of educational programs. Bird Kingdom has been voted a top family attraction in Niagara Falls and was inducted into the Trip Advisor Hall of Fame in 2016.