Kakapo the reason for its massive decline since the introduction of dogs, cats and mustelids (see "Conservation: Human impact"). The kakapo is the only species of flightless parrot in the world, and the only flightless bird that has a lek breeding system. Males loosely gather in an arena and compete with each other to attract females. Females listen to the males as they display, or "lek". They choose a mate based on the quality of his display; they are not pursued by the males in any overt way. No pair bond is formed; males and females meet only to mate. During
Only Girl (In the World) Bed", "What's My Name?" and "S&M" on NBC's May 27, 2011 "Today" as part of its summer concert series. The song, which was included on the Loud, 777 and the Diamonds World Tours, was the opener for her performance at Radio 1's Hackney Weekend on May 24, 2012. She also performed the song at the 2016 MTV Video Music Awards. Katy Perry covered "Only Girl (In the World)" as part of an acoustic mash-up with Willow Smith's "Whip My Hair" on her California Dreams Tour (2011). Ellie Goulding covered the song during her appearance on Radio 1's Live Lounge, and