In a large saucepan, melt butter over medium heat. Once melted, add marshmallows and stir continuously until melted. Remove from heat and quickly fold in the cereal, until completely coated.
Press lightly into a buttered 13x9 baking sheet. Allow to set, about 30 minutes.
Using a 2 1/2 inch round cookie cutter (or whatever desired size), cut circles into the krispie treat. Eat discards immediately.
Using the melted semi-sweet chocolate, attach about 5 candy corn for feathers, one wafer for the face, two eyes and half of an orange m&m for the beak. Feel free to add a red candy (or pipe on red candy melts) for the waddle.
Notes
Don't press the mixture into the pan too much or the bars will be too hard.