Two long tail-like projections extend from the rear end of the White Furcula caterpillar. Though harmless, they look almost capable of stinging, which could be a tool of mimicry that helps deter predators. The caterpillar changes color as it matures. Young ones may appear black or purple with yellow bands on the 'tails'. Older ones are green with brown 'saddles', looking more like a partially dried-up leaf. The green portions may be yellow depending on age. The head may seem flat when it is tucked in thanks to two horn-like projections that grow up from the 'shoulders'. The front end is boxy and wider than the rear.
These striking caterpillars feed on aspen, cherry, poplar, and willow trees. They pupate overwinter.
The map above showcases (in blue) the states and territories of North America where the White Furcula Caterpillar may be found (but is not limited to). This sort of data can be useful in seeing concentrations of a particular species over the continent as well as revealing possible migratory patterns over a species' given lifespan. Some species are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America.*NOTE: States/Territories shown above are a general indicator of areas inhabited by the White Furcula Caterpillar. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.