Bird migration perils cold temperatures on the wintering grounds kills thousands of birds, resulting in 30-90% population declines of migratory birds. For example, between 27000 and 62000 ducks, mostly tufted duck and common pochard, starved to death during a very cold winter in March 1986. The passing of Migratory Bird Treaty (US, 1916) and Migratory Birds Convention Act (Canada, 1917) made it illegal to kill or capture migratory birds. Even though migratory bird acts were passed at the beginning of the 19th century, many countries still have no laws or programs to protect migratory birds. International bird trade is a multibillion-dollar industry and
Big Bird to the cassowary; he replied, "I'm more of a condor." On the January 23, 1976 episode of "Hollywood Squares", Big Bird was asked what kind of bird he is and said he was a lark, causing host Peter Marshall to crack up. In the film "Don't Eat the Pictures", Osiris calls Big Bird an ibis. Big Bird appeared in a series 11 episode of "Mister Rogers' Neighborhood", in which he declares he is a "golden condor". Zoologist Mike Dickison suggested in his popular Pechakucha talk that Big Bird represents a unique species that evolved from the whooping crane. Big Bird