What kind of egg is this, shining in the sunlight? Photo by Bryan Pfeiffer.
Answer
Canadian tiger swallowtail egg.
This is the egg of a Canadian tiger swallowtail butterfly (Papilio canadensis).Females lay eggs singly on the leaves of host plants. When the larvae emerge, they eat the leaves of their host plants, which include ash, poplar, willow, and cherry.
This week’s contest winner was Jeff Kline of Charleston, SC