It is the only species in its genus, but the Dimorphic Macalla makes up for its singularity by having two color versions. The tan variation has a straw-colored upper wing with a dark line that separates it from a chocolate brown bottom part. The green variation has a light or mint green forewing, but retains that brown bottom part. This moth may also be called a Dimorphic Epipaschia. As a Pyralid moth, it is likely attracted to lights at night.
Black and yellow caterpillars feed on the leaves of poison ivy and poison sumac. A thin orange line runs down the middle of the wide yellow stripe on the 'back'. Be sure to resist touching the caterpillar if it is found on these plants, or risk rubbing the toxic urushiol oil onto skin. Most people are highly allergic to urushiol and develop tremendously itchy blisters and red patches on contact that can take weeks to heal.
General Characteristics Capability, Shape, Texture/Pattern, Benefits, Dangers
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns.
Territorial Map U.S., Canada, and Mexico
Prince Edward Is.
Butterfly and Moth Anatomy
Antennae: Butterflies and Moths have a pair of antennae on the head used for sensing.
Head: The head is home to the insect's eyes, antennae, and proboscis.
Thorax: Home to the three pairs of legs as well as vital internal organs.
Abdomen: Contains vital internal organs such as the heart(s) and reproduction facilities.
Forewing: The upper, forward wing pair used for flying.
Hindwing: The lower, rearward wing pair used for flying.
NOTE: Butterflies and Moths are part of the Lepidopteran order as they share many similarities.