The name for the Long-horned Slug Moth stems from its caterpillar's long antennae that dwarf the similar protrusions at its rear.
Not much is known about the life history of this species. The Long-horned Slug Moth adult is light brown with furry tan legs. Thin ivory crescents lines grace the lower part of each forewing. Dark brown spots form a curve near the bottom edge.
The larval form of this moth gets more attention. As a member of the Slug Moth family, the caterpillar looks more like a snail without its shell than a typical worm-like caterpillar. Its fleshy green body is oblong in shape and has groups of short bristles on it. The dorsal (back) side has a wide yellow-orange band that runs the length of the 'spine'. Two reddish-purple diamonds are linked to each other near the head with three more reddish-purple diamonds near the rear. A gap between these front and rear sets resembles a break in the diamond chain. Two long, red antennae extend from the head and two shorter ones protrude from the rear. Both sets are covered in short hairs.
Scientific Name: Adoneta bicaudata
Butterfly or Moth
Size (Adult; Length): 18mm to 22mm (0.70in to 0.86in)
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. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.
Butterfly and Moth Anatomy
Antennae: Butterflies and Moths have a pair of antennae on the head used as sensors.
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.