hmm i couldn't find many birds dressed up... many look stupid enough already. here is a fairly poor selection i'm afraid:
Spoiler:
bird in a hat;
bird dressed as though on a hen night;
and lastly a parrot as the president of the phillippines:
sorry. it was harder than i thought. ok... i'd like a selection of nice christmas stockings, cos i'm going to make some and i need some inspiration please