Big Bird was originally designed by a drawing from Jim Henson and built by Kermit Love in 1969. The design was based on a previous Henson creation: A seven foot tall dragon that the puppeteer created for a La Choy advertising campaign. The Big Bird performer is completely enclosed within the costume, and extends his right hand over his head to operate the head and neck of the puppet. The Muppeteer's left hand serves as the Bird's left wing, while the right wing is stuffed and hangs loosely from a fishing line that runs through a loop under the neck and attaches to the wrist of the left hand. The right hand thus does the opposite of the left hand: as the left hand goes down, the right hand is pulled up by the fishing line. For some of the Journey to Ernie segments, a second puppeteer (usually Jim Martin) controls Big Bird's right wing. He is concealed by dressing in a body suit the same color as their chroma key background (something that obviously cannot be done on the main Sesame Street set).  Big Bird's body suit weighs ten pounds, and his head weighs four pounds. According to writer Louise Gikow, the heat inside the suit is "unbearable, and it's extraordinarily difficult to hold Big Bird's head. "