iThe mourning cloakâs dark wings are edged with a pale border and a row of blue dots. Its caterpillars feed together in groups when young and use trees such as black willow, American elm, and paper birch.
iiThe mourning cloakâs dark wings are edged with a pale border and a row of blue dots. Its caterpillars feed together in groups when young and use trees such as black willow, American elm, and paper birch.