I walked around outside my building for a little while today, looking for something to photograph. I had a picture of a rusty chain last week and in the same area, on one of the picnic tables that are stored there, was this husk of an eastern black walnut (Juglans nigra) seed. They are quite popular with the squirrels. The birds basically leave them along because there aren’t any bird around here with the ability to get into the shells. With the gnawing ability common in rodents, however, squirrels have no trouble with these delicious (and relatively high calorie) nuts.