Butterfly and Four-footed butterfly

Butterfly noun - Diurnal insect typically having a slender body with knobbed antennae and broad colorful wings.

Four-footed butterfly and butterfly are semantically related. In some cases you can replace phrase "Four-footed butterfly" with "Butterfly", this terms are similar.

Four-footed butterfly noun - Medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast.

Butterfly and four-footed butterfly are semantically related. You can use "Butterfly" instead a noun phrase "Four-footed butterfly".