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'
War of the Birds even in the film at which Fagin scratched his slave and when Betty ripped out Fagin's eye and at Armstrong's party was sexual content. About 30 seconds of the film was cut for the U.S. release. War of the Birds War of the Birds () is a Danish animated movie directed by Jannik Hastrup in 1990, about two orphan birds, Oliver and Olivia, who fight against an evil vulture with the help of two mice. It is based on a children's book of the same name from Bent Haller. In a forest lives a community of birds who live peacefully,