A super bite is performed by holding B when you have a charge. You get 1 charge for every 100 Opals you collect in a stage (you'll see a number in the Opal icon at the top-right corner showing how many charges you have).
When you've charged the super bite, release B and Ty will fly forward. Idea is to approach the turkey in Walk in the Park (first hub area) and charge the super bite from a distance. You get quite some distance so you should have some leniency.