Cov zom zom yog qhov tseem ceeb tshaj plaws ntawm cov zom. Cov sib tsoo sib tsoo sib tsoo yuav ncaj qha faib cov hmoov kas fes. Tam sim no muaj ntau yam zom zom cov hom burrs tau muab faib ua conical burr, tiaj tus nplawm thiab dab cov hniav burr.