Flightless bird that require a significant amount of overall metabolic energy, ratites decrease their basal metabolic rate and conserve energy. A study looking at the basal rates of birds found a significant correlation between low basal rate and pectoral muscle mass in kiwis. On the contrary, flightless penguins exude an intermediate basal rate. This is likely because penguins have well-developed pectoral muscles for hunting and diving in the water. For ground feeding birds, a cursorial lifestyle is more economical and allows for easier access to dietary requirements. Flying birds have different wing and feather structures that make flying easier, while flightless birds'
Hardcore UFOs: Revelations, Epiphanies and Fast Food in the Western Hemisphere Matador Out-of-Print Singles, B-Sides & Compilation Tracks. The third disc is Delicious Pie & Thank You for Calling: Previously Unreleased Songs and Recordings. The fourth disc is Live at the Wheelchair Races: Unreleased Live Recordings 1995–2002. The fifth (and final) disc is Forever Since Breakfast: The 1986 Debut EP. This was GBV's first official release. Hardcore UFOs: Revelations, Epiphanies and Fast Food in the Western Hemisphere Hardcore UFOs: Revelations, Epiphanies and Fast Food in the Western Hemisphere is an anthology box set released by Guided by Voices in 2003. The first disc is , which was also released separately at