/ˈθʌndəbəːd/ noun 1 (in some North American Indian cultures) a mythical bird that brings thunder. 2 Australian Either of two thickheads (birds) which become noisy before and during thunderstorms. The golden whistler (Pachycephala pectoralis) and the rufous whistler (P. rufiventris), family Pachycephalidae
The thunderbird flew high over the plains, soaring east ahead of the bank of clouds. Thunder and heavy rain would soon follow.