After looking over, and rejecting, some flowers in a garden, a discriminating hummingbird decides to call Calyx & Corolla for that "perfect holiday gift." The estimated $2 million effort from the upscale purveyor of flowers breaks today on national cable channels. Goldberg Moser O'Neill, San Francisco, shot the spot at Oxford Scientific Films in the U.K., where Exec VP-Creative Director Mike Moser struggled to get the bird to fly instead of lounging in the warmth of the lights. Mr. Moser was art director for the spot. Copywriter: Dave Woodside.