Largest organisms were related to the ostrich. They exceeded in height and . The last of the elephant birds became extinct about 300 years ago. Of almost exactly the same upper proportions as the largest elephant birds was "Dromornis stirtoni" of Australia, part of a 26,000-year-old group called mihirungs of the family Dromornithidae. The largest carnivorous bird was "Brontornis", an extinct flightless bird from South America which reached a weight of and a height of about . The tallest carnivorous bird was "Kelenken", which could reach 3 to 3.2 meters in height and 220 to 250 kilograms. The tallest bird ever was
François Lays Cherubini made the courageous decision to use his discretionary powers and take personal responsibility for authorising a special performance whose takings would be divided equally between the Académie and Lays. Even if it is unclear what right the director of the École royale de musique et de déclamation had to make such a decision, the performance did in fact take place at the Opéra on 20 November 1826. The programme consisted of Boieldieu's opéra comique "Le calife de Bagdad"; the second act of "Anacréon chez Polycrate", in which Lays played his most famous role for the last time; and the