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Extremely variable, the underside can be almost black, pale gray, dark gray, or mottled in any combination of the foregoing. The long palps protruding from the front of its head gives this fascinating species its name.
Pretty much anywhere there is a hackberry tree!
Throughout warm weather.
In Mexico, the Spanish name for this butterfly is Pinocchio.
Common over much of its range, in southern Texas this species often has spectacular population eruptions. The migrating populations are sometimes so large, with many millions of individuals, that they can darken the sky and cause highways to be closed, because the huge numbers killed by cars causes the roadway to become slick.