Amorpha juglandis
The caterpillar feeds on alder (Alnus), hickory (Carya), hazelnut (Corylus), beech (Fagus), walnut (Juglans), and hop-hornbeam (Ostrya) species. The caterpillar can make a high-pitched whistles. It comes from spiracles in its abdomen. This will startle the bird which will probably not eat it because of that.