black caterpillar with yellow underside
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Posted in Caterpillars

Black Caterpillars with Yellow Undersides

A reader wrote to us via the All About Worms Facebook page recently about some black caterpillars in her backyard. “Some” black caterpillars probably doesn’t quite capture the situation, as the reader reports that they are “all over” her backyard. The black caterpillars are “yellow underneath,” although you can’t really see this in the picture the reader submitted. The reader is wondering what these black caterpillars in her backyard are, if they are even caterpillars.